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Animals publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Impact of Diet Nutritional Quality on Swine Gastrointestinal Health and Growth Performance

edited by

Mayra Anton Dib Saleh

submission deadline 25 Dec 2025 | 4 articles | Viewed by 7624 | Submission Open

Keywords: alternative feedstuffs; feed additives; immunomodulation; intestinal biomarkers; intestinal microbiota; intestinal morphometry; metabolism; multi-omics; physiological stress; pig immunity and welfare

(This special issue belongs to the Section Pigs)

The Invasive Blue Crab: Implications for Fisheries, Aquaculture and One Health Perspective

edited by

Giuseppe Esposito

Silvia Colussi

and

Paolo Pastorino

submission deadline 25 Dec 2025 | 4 articles | Viewed by 5105 | Submission Open

Keywords: Callinectes sapidus; animal health; invasive alien species; biodiversity; habitat structures; ecosystem services; animal genetics; environmental pollution

(This special issue belongs to the Section Aquatic Animals)

Best Practices for Zoo Animal Welfare Management

edited by Oriol Talló-Parra and

Xavier Manteca

submission deadline 30 Dec 2025 | 5 articles | Viewed by 9991 | Submission Open

Keywords: animal welfare assessment; environmental enrichment; euthanasia; geriatric animals; feeding practices; facility design; human– animal interactions

(This special issue belongs to the Section Zoo Animals)

Beyond the Home: Exploring Human–Animal Relationships in Veterinary, Agricultural, and Workplace Contexts

edited by

Ana Junça-Silva

submission deadline 30 Dec 2025 | 2 articles | Viewed by 4401 | Submission Open

Keywords: human– animal interactions; human– animal bonds; pets; companion animals; pet-owners

(This special issue belongs to the Section Human-Animal Interactions, Animal Behaviour and Emotion)

New Developments in Livestock Production Systems: Improving Meat Production

edited by

José Segura

, Luis Calvo and Stephanie Lam

submission deadline 30 Dec 2025 | 2 articles | Viewed by 3773 | Submission Open

Keywords: livestock; meat; novel production systems; lean meat yield; retail cut yield; welfare; health

(This special issue belongs to the Section Animal Products)

Thermoregulatory and Physiological Adaptations of Reptiles and Amphibians to Changing Environments

edited by

Kostas Sagonas

submission deadline 30 Dec 2025 | 2 articles | Viewed by 3589 | Submission Open

Keywords: thermal biology; metabolism; adaptation; climate change; ecology; evolution

(This special issue belongs to the Section Herpetology)

People and Pets: Factors Affecting the Acquisition, Characteristics and Relinquishment of Companion Animal Relationships

edited by Lindsay Murray and Janine Carroll

submission deadline 31 Dec 2025 | 10 articles | Viewed by 31549 | Submission Open

Keywords: human– animal interactions; companion animals; pets; dogs; cats; characteristics; health; COVID-19 pandemic; cost of living; adoption; relinquishment; relationships

(This special issue belongs to the Section Human-Animal Interactions, Animal Behaviour and Emotion)

Second Edition: Research on the Human–Companion Animal Relationship

edited by

Udo Ganslosser

submission deadline 31 Dec 2025 | 10 articles | Viewed by 25316 | Submission Open

Keywords: social behaviour in mammals; zoobiology; human– nonhuman– animal relationship; behavioural aspects of animal welfare and conservation biology

(This special issue belongs to the Section Human-Animal Interactions, Animal Behaviour and Emotion)

Changes in Population Characteristics of Marine and Freshwater Organisms and Their Environmental Driving Factors

edited by

Heng Zhang

submission deadline 31 Dec 2025 | 19 articles | Viewed by 22542 | Submission Open

Keywords: population characteristics; spatial– temporal dynamics; biology; environmental factor; climate change; species distribution; eDNA; resource abundance; marine and freshwater organisms

(This special issue belongs to the Section Aquatic Animals)

Enhancing Product Excellence in Poultry: Key Factors Influencing Egg and Meat Quality

edited by

Kamil Drabik

and Kornel Kasperek

submission deadline 31 Dec 2025 | 7 articles | Viewed by 21540 | Submission Open

Keywords: quality of poultry raw materials; poultry farming; poultry welfare; rearing systems; chemical composition of meat and eggs; shelf life of poultry raw materials; modification of bird nutrition; use of niche poultry species

(This special issue belongs to the Section Poultry)

Avian Haemosporidian Parasites: Causes and Consequences of Infection

edited by

Santiago Merino Rodríguez

submission deadline 31 Dec 2025 | 4 articles | Viewed by 18274 | Submission Open

Keywords: factors affecting Haemosporidian transmission and effects on birds and vectors; bird-related factors; climate effects on transmissions and host infections; factors affecting distribution and incidence of infections; bird– Haemosporidian– vector interactions

(This special issue belongs to the Section Birds)

Recent Advances in Canine Mammary Tumors—2nd Edition

edited by

Debora Aparecida Pires de Campos Zuccari

Luiz Gustavo de Almeida Chuffa

and

Guilherme Henrique Tamarindo

submission deadline 31 Dec 2025 | 6 articles | Viewed by 16934 | Submission Open

Keywords: dogs; cancer; biomarkers; diagnosis; prognosis; extracellular vesicles; therapeutics; liquid biopsy; comparative oncology; translational models

(This special issue belongs to the Section Companion Animals)

Novel Insights into Lipid Metabolism in Aquatic Animals

edited by

Xiangfei Li

submission deadline 31 Dec 2025 | 8 articles | Viewed by 15085 | Submission Open

Keywords: lipid homeostasis; fatty acid sensing; lipid metabolism disorder; organelle dysfunction; intestinal microbiota; fish welfare; flesh quality; precise nutrition; nutritional intervention; omics technology

(This special issue belongs to the Section Aquatic Animals)

Mathematical Modeling and Computer Vision in Animal Activity or Behavior: 2nd Edition

edited by

Haiming Gan

and

Yueju Xue

submission deadline 31 Dec 2025 | 9 articles | Viewed by 13221 | Submission Open

Keywords: animal behavior; mathematical modeling; computer vision; machine learning; behavior prediction; image processing; automated monitoring; sensor-based systems; animal welfare; livestock farming

(This special issue belongs to the Section Animal System and Management)

Selected Papers of the XXIV Congress of the Italian Society of Sheep and Goat Pathology and Production (SIPAOC) “Sustainability of Sheep and Goat Farming”

edited by Giuseppe Moniello,

Maria Teresa Manfredi

and

Massimo Trabalza-Marinucci

submission deadline 31 Dec 2025 | 4 articles | Viewed by 13172 | Submission Open

Keywords: ovines; goats; small ruminant production; sheep and goat breeding and pathologies; sustainability

(This special issue belongs to the Section Small Ruminants)

Advances in Cattle Genetics and Breeding

edited by Ferenc Szabó and

Gabriella Holló

submission deadline 31 Dec 2025 | 13 articles | Viewed by 12382 | Submission Open

Keywords: cattle; population genetics; molecular genetics; breeding value; reproduction; production; longevity; conformation

(This special issue belongs to the Section Animal Genetics and Genomics)

Infections and Diarrhea of Enteric Coronaviruses in Pigs

edited by

Changchao Huan

, Yanrong Zhou and Longjun Guo

submission deadline 31 Dec 2025 | 5 articles | Viewed by 11800 | Submission Open

Keywords: PEDV; PDCoV; TGEV; SADS-CoV; virus– host interaction; pathogenesis; immunity; antiviral strategies; evolution; viral replication

(This special issue belongs to the Section Pigs)

Respiratory Diseases of Companion Animals

edited by

Olga Szaluś-Jordanow

submission deadline 31 Dec 2025 | 5 articles | Viewed by 11487 | Submission Open

Keywords: dog; cat; respiratory medicine; nose; trachea; bronchus; lung; mediastinum; pleural cavity; neoplasia; infections disease; inflammatory disease

(This special issue belongs to the Section Companion Animals)

Advances in Husbandry Science and Reintroductions for the Conservation of Amphibians and Reptiles

edited by

Francesco Di Ianni

and Alessandro Vetere

submission deadline 31 Dec 2025 | 1 articles | Viewed by 10824 | Submission Open

Keywords: reptiles; amphibians; reproduction; assisted fertilization; sex identification; conservation

(This special issue belongs to the Section Herpetology)

Canine and Feline Obesity

edited by

Patrícia Massae Oba

Maria Cattai de Godoy

, Júlia Guazzelli Pezzali and

Márcia De Oliveira Sampaio Gomes

submission deadline 31 Dec 2025 | 3 articles | Viewed by 10712 | Submission Open

Keywords: companion animals& rsquo; obesity; obesity management; weight management; obesity-related diseases; preventive veterinary care; companion animals& rsquo; nutrition; pet-owner relationship; canine and feline health

(This special issue belongs to the Section Companion Animals)

Livestock and Poultry Genetics and Breeding Management

edited by

Yuguo Yuan

submission deadline 31 Dec 2025 | 7 articles | Viewed by 9538 | Submission Open

Keywords: animal genetics; breeding management; gene editing; genomic selection; livestock improvement; reproductive health; performance traits; cloning technologies; bioinformatics in breeding

(This special issue belongs to the Section Animal Genetics and Genomics)

Genetic Research for Improving Livestock Heat Stress Resistance

edited by

Kun-Lin Chen

submission deadline 31 Dec 2025 | 6 articles | Viewed by 9359 | Submission Open

Keywords: farm animals; production performance; stress response

(This special issue belongs to the Section Animal Genetics and Genomics)

Recent Advances in Mare Reproduction

edited by

Ana Amaral

submission deadline 31 Dec 2025 | 2 articles | Viewed by 8801 | Submission Open

Keywords: mare; equine; reproduction; fertility; pregnancy; assisted reproductive technologies; reproductive physiology; reproductive disorders

(This special issue belongs to the Section Equids)

Apicomplexan Parasites in Animals: Insights into Epidemiology, Control, Vaccination, and Host Interactions

edited by

Mingming Liu

Kun Li

and Jixu Li

submission deadline 31 Dec 2025 | 1 articles | Viewed by 8594 | Submission Open

Keywords: Apicomplexa; animals; epidemiology; control; vaccine; host interactions

(This special issue belongs to the Section Veterinary Clinical Studies)

Small Mammals as Contributors to Terrestrial Ecosystem Functioning

edited by

Linas Balčiauskas

and Alexander Csanády

submission deadline 31 Dec 2025 | 3 articles | Viewed by 8312 | Submission Open

Keywords: small mammals; long-term studies; monitoring; climate change; environmental changes; disease ecology; trophic interactions; genetic diversity

(This special issue belongs to the Section Mammals)

Advancements in Nutritional Management of Companion Animals

edited by

Ricardo D. Ekmay

and Andrew Magnuson

submission deadline 31 Dec 2025 | 3 articles | Viewed by 8239 | Submission Open

Keywords: animal health; companion animal; longevity; nutrition strategies; pet food; precision nutrition

(This special issue belongs to the Section Animal Nutrition)

Animal Stress and Welfare During Transport and Slaughtering: Second Edition

edited by

Elbert Lambooij

submission deadline 31 Dec 2025 | 5 articles | Viewed by 7924 | Submission Open

Keywords: slaughter animals; welfare; meat quality; legislation; consumers concern; movement; handling; economic aspects

(This special issue belongs to the Section Animal Welfare)

Genetics, Breeding, and Farming of Aquatic Animals

edited by Min Tao,

Chenghui Wang

and Qizhi Liu

submission deadline 31 Dec 2025 | 7 articles | Viewed by 7715 | Submission Open

Keywords: aquatic animals; genetics and breeding; breeding biotechnology; germplasm resource protection; germplasm utilization; growth and reproduction; healthy farming; disease resistance; animal nutrition

(This special issue belongs to the Section Animal Genetics and Genomics)

Reproductive Management Strategies for Dairy and Beef Cows

edited by Nicholas Wege Dias

submission deadline 31 Dec 2025 | 3 articles | Viewed by 7494 | Submission Open

Keywords: bovine reproduction; reproductive technology and management; theriogenology; endocri-nology

(This special issue belongs to the Section Animal Reproduction)

Transcriptomics in Livestock: Unveiling Genetic Insights for Enhanced Productivity and Health

edited by

Jun-Mo Kim

, Byeonghwi Lim and Seung-Hoon Lee

submission deadline 31 Dec 2025 | 6 articles | Viewed by 7408 | Submission Open

Keywords: transcriptomics; RNA-seq; gene expression; functional genomics; gene regulation; genomic technologies; livestock; health; productivity

(This special issue belongs to the Section Animal Genetics and Genomics)

Heat Stress in Farm Animals: The Impacts of Climate Change on Animal Comfort Conditions

edited by

Welligton Conceição da Silva

, José de Brito Lourenço-Júnior and Jamile Andréa Rodrigues da Silva

submission deadline 31 Dec 2025 | 4 articles | Viewed by 7147 | Submission Open

Keywords: animal welfare; heat stress; cattle; buffalo; small ruminants; animal physiology; animal behavior; sustainability

Advances in Internal Medicine in Equids

edited by Alejandro Pérez-Écija and

Francisco J. Mendoza

submission deadline 31 Dec 2025 | 5 articles | Viewed by 6655 | Submission Open

Keywords: horse; donkey; internal medicine; cardiology; neonatology; neurology; immunology; endocrinology; clinical pathology; physiology; infectious diseases; pharmacology; critical care; emergencies

(This special issue belongs to the Section Equids)

Lifelong Health and Performance in Working Dogs: Physical and Psychological

edited by Melissa Singletary

submission deadline 31 Dec 2025 | 1 articles | Viewed by 6125 | Submission Open

Keywords: working dog; health; welfare; mental health; physical health; performance; career longevity; psychological health; canine aging; enrichment

(This special issue belongs to the Section Companion Animals)

Impacts of Silage-Based Forages on Ruminant Health and Welfare

edited by

Fulin Yang

submission deadline 31 Dec 2025 | 4 articles | Viewed by 5138 | Submission Open

Keywords: silage nutrition; ruminant production; sustainable agriculture; silage preservation techniques; rumen fermentation; nutrient absorption; animal health enhancement; growth performance; environmental sustainability; silage-based diets

(This special issue belongs to the Section Animal Nutrition)

Sperm Quality Assessment in Domestic Animals

edited by

Krzysztof Górski

and Stanisław Kondracki

submission deadline 31 Dec 2025 | 3 articles | Viewed by 4890 | Submission Open

Keywords: sperm quality; sperm morphology; semen preservation; semen storage; sperm dimension

(This special issue belongs to the Section Animal Reproduction)

Effects of Heat Stress on Animal Reproduction and Production

edited by Leonel Avendaño-Reyes

submission deadline 31 Dec 2025 | 7 articles | Viewed by 4799 | Submission Open

Keywords: hot environment; body temperature; milk production and composition; daily weight gain; growth rate; conception rate; reproductive efficiency; fertility; semen quality

(This special issue belongs to the Section Animal System and Management)

Diagnostic Research, Epidemiology and New Therapeutic Options in Companion and Wild Animals: 2nd Edition

edited by

Felisbina Luisa Queiroga

submission deadline 31 Dec 2025 | 4 articles | Viewed by 4534 | Submission Open

Keywords: artificial intelligence (AI) in diagnostics; minimally invasive procedures; biomarkers and prognostic factors; epidemiology of infectious and neoplastic diseases; AI-driven predictive models in treatment; companion and wild animal diseases; one health and zoonoses; diagnostic imaging and histopathology; molecular techniques in veterinary medicine; new therapeutic approaches (immunotherapy; gene therapy; hormone therapy)

(This special issue belongs to the Section Veterinary Clinical Studies)

Antimicrobial Peptides in Animals and Their Application in Veterinary Medicine

edited by

Filippo Fratini

and

Francesca Paola Nocera

submission deadline 31 Dec 2025 | 1 articles | Viewed by 4161 | Submission Open

Keywords: bacteria; antibiotic resistance; antimicrobial peptides; mechanisms of action; clinical potential

(This special issue belongs to the Section Veterinary Clinical Studies)

Nutrition and Health of Aquatic Animals

edited by

Jianan Xian

submission deadline 31 Dec 2025 | 2 articles | Viewed by 3390 | Submission Open

Keywords: nutrition; immunity; disease resistance; aquatic animals; feed

(This special issue belongs to the Section Aquatic Animals)

Recent Advances in Nutritional Ingredients for Aquaculture

edited by

Matteo Zarantoniello

submission deadline 31 Dec 2025 | 3 articles | Viewed by 3170 | Submission Open

Keywords: aquaculture; fish nutrition; crustacean nutrition; aquafeeds; feed additives; aquafeeds ingredients; fish welfare; fillet quality

(This special issue belongs to the Section Animal Nutrition)

Poultry Nutritional Requirements

edited by Fernando Guilheme Perazzo Costa

submission deadline 31 Dec 2025 | 2 articles | Viewed by 2657 | Submission Open

Keywords: poultry; requirements; energy; amino acid; vitamins; trace elements

(This special issue belongs to the Section Animal Nutrition)

Human–Animal Interaction: Animal Behaviour and Whole-Person Health in Animal-Assisted Interventions

edited by Meredith L. Stensland

submission deadline 31 Dec 2025 | 1 articles | Viewed by 2422 | Submission Open

Keywords: animal-assisted intervention; whole-person health; human– animal bond; animal behaviour

(This special issue belongs to the Section Human-Animal Interactions, Animal Behaviour and Emotion)

Sentinel Species and Environmental Pollutants Exposure in Animal Health

edited by Clara Naccari and Ernesto Palma

submission deadline 31 Dec 2025 | 1 articles | Viewed by 2222 | Submission Open

Keywords: sentinel species; bio-indicators; inorganic and organic contaminats; environmental pollution; animals health status

(This special issue belongs to the Section Ecology and Conservation)

Adaptations for Animal Survival: Morphological Features or Physiological Mechanisms—Second Edition

edited by

Roberto Cabo

submission deadline 31 Dec 2025 | 2 articles | Viewed by 1485 | Submission Open

Keywords: adaptation; evolution; habitat; environment; morphology; physiology; survival

(This special issue belongs to the Section Wildlife)

Environmental Physiology and Health in Animals: Mechanisms, Adaptations and Welfare

edited by Dan Shen and

Chunmei Li

submission deadline 31 Dec 2025 | 3 articles | Viewed by 1387 | Submission Open

Keywords: animal physiology; animal– environment interaction; molecular adaptation; adaptation mechanisms; animal welfare

(This special issue belongs to the Section Animal Physiology)

Assisted Reproductive Technologies in Production Animals

edited by

Andrés Gambini

and

Rafael Fernández-Martín

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1314 | Submission Open

Keywords: assisted reproductive technologies; livestock breeding; in vitro fertilization; embryo transfer; intracytoplasmic sperm injection; genetic improvement; sustainable agriculture; animal welfare; cloning; in vitro breeding; stem cells

(This special issue belongs to the Section Animal Reproduction)

Surgical Procedures and Postoperative Complications in Animals

edited by Federico Massari

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1221 | Submission Open

Keywords: complication; surgical procedure; postoperative; outcome; recovery

(This special issue belongs to the Section Veterinary Clinical Studies)

Advances in Small Ruminant Lentivirus Research: New Diagnostics, Emerging Trends, and Future Perspectives

edited by

Monika Olech

submission deadline 31 Dec 2025 | 1 articles | Viewed by 1118 | Submission Open

Keywords: small ruminant lentiviruses; SRLV; MVV; CAEV; sheep; goats; wild ruminants; diagnosis; management strategies

(This special issue belongs to the Section Veterinary Clinical Studies)