Refinement Database

Database on Refinement of Housing, Husbandry, Care, and Use of Animals in Research

This database, created in 2000, is updated every four months with newly published scientific articles, books, and other publications related to improving or safeguarding the welfare of animals used in research.

Tips for using the database:

  • This landing page displays all of the publications in the database.
  • Use the drop-down menus to filter these publications by Animal Type, Setting, and/or Topic.
  • Clicking on a parent category (e.g., Rodent) will include publications relating to all the items in that category (e.g., Chinchilla, Gerbil, Guinea Pig, etc.).
  • You may also add a keyword to further narrow your search.
  • Please note that at this time, only publications dated 2010 or later (with some exceptions) can be filtered by Animal Type and Topic, and only publications dated 2020 or later (with some exceptions) can be filtered by Setting. Most publications older than 2010 can only be searched by keyword. 
Morello, G. M., Hultgren, J., Capas-Peneda, S. et al. 2020. High laboratory mouse pre-weaning mortality associated with litter overlap, advanced dam age, small and large litters. PLOS ONE 15(8): e0236290.

High and variable pre-weaning mortality is a persistent problem in laboratory mouse breeding. Assuming a modest 15% mortality rate across mouse strains, means that approximately 1 million more pups are produced yearly in the EU...

Feige-Diller, J., Krakenberg, V., Bierbaum, L. et al. 2020. The effects of different feeding routines on welfare in laboratory mice. Frontiers in Veterinary Science 6, 479.

The accepted norm in most laboratories around the globe is feeding laboratory mice an ad libitum diet, although several health impairments are well-established. In contrast, reducing the animals' body weight by feeding them less food...

Reinhardt, V. (ed.) 2020. It’s Okay to Cry - Discussions by the Laboratory Animal Refinement & Enrichment Forum [LAREF], Volume V. Animal Welfare Institute, Washington, DC.

This is the 5th volume of selected discussions that took place on the electronic Laboratory Animal Refinement & Enrichment Forum between February 2016 and December 2019. The forum was created in October 2002; it allows...

Stevens, C., Finnegan, E., Clarkson, J. et al. 2020. Report of the 2019 RSPCA/UFAW Rodent Welfare meeting. Animal Technology and Welfare 19(2), 101-111.

The RSPCA/UFAW Rodent Welfare Group has held a one-day meeting every autumn for the last 26 years, so that its members can discuss current welfare research, exchange views on welfare issues, and share experiences of...

Carpenter, K. C., Thurston, S. E., Hoenerhoff, M. J. et al. 2020. Effects of trio and pair breeding of mice on environmental parameters and nasal pathology and their implications for cage change frequency. JAALAS 59(3), 288–297.

According to the Guide, cage change frequencies must be considered when cage density requirements are exceeded. We monitored ammonia, carbon dioxide, cage wetness, health status, and breeding parameters of trio and pair breeding cages containing...

Dupepe, L. M., Dauchy, R. T., McAndrew, D. et al. 2020. Eliminating light-at-night contamination during a lab animal facility renovation. Laboratory Animal Science Professional 8(5) (September/October), 60-62.

Relocating laboratory animal research from one animal facility room to another in advance of major renovations can be a daunting task for scientists and animal care personnel alike. This is especially so regarding controlled lighting...

Bodden, C., Wewer, M., Kästner, N. et al. 2021. Not all mice are alike: Mixed-strain housing alters social behaviour. Physiology & Behavior 228, 113220.

The use of millions of mice in scientific studies worldwide emphasises the continuing need for a reduction of sample sizes, however, not at the expense of scientific validity. Split-plot designs have been suggested to enhance...

Gomes Correa, M., Ferreira Rodrigues e Silva, C., Antunes Dias, L. et al. 2020. Welfare benefits after the implementation of slow-feeder hay bags for stabled horses. Journal of Veterinary Behavior 38, 61-66.

Horse confinement is a common practice worldwide. However, preventing horses from grazing and denying them social interaction can compromise their welfare and lead to undesirable consequences. Considering the hypothesis that increasing the forage consumption time...

Davis, K. M., Iwaniuk, M. E., Dennis, R. L. et al. 2020. Effects of grazing muzzles on behavior and physiological stress of individually housed grazing miniature horses. Applied Animal Behaviour Science 231, 105067.

Grazing muzzles are used on obese-prone equids to limit intake of pasture while grazing. However, the length of time grazing muzzles must be worn to prevent weight gain and whether they impede normal grazing behavior...

Davis, K. M., Iwaniuk, M. E., Dennis, R. L. et al. 2020. Effects of grazing muzzles on behavior, voluntary exercise, and physiological stress of miniature horses housed in a herd. Applied Animal Behaviour Science 232, 105108.

Grazing muzzles are a popular and effective management tool used to help prevent weight gain in obese-prone equids. Concerns have been raised over their possible negative impact on horse well-being as muzzles may interfere with...

Hanis, F., Chung, E. L. T., Kamalludin, M. H. et al. 2020. Discovering the relationship between dietary nutrients and cortisol and ghrelin hormones in horses exhibiting oral stereotypic behaviors: A review. Journal of Veterinary Behavior 39, 90-98.

This review focuses on associations of cortisol and the hormone ghrelin on abnormal oral behaviors, predominantly stereotypic behavior, in horses. Abnormal oral behaviors are prevalent in the stabled horse population. Feeding practice and satiety seem...

Janczarek, I., Wiśniewska, M., Wnuk-Pawlak, E. et al. 2020. Effects of horse blankets on the physiological and motion parameters of geriatric horses. Journal of Veterinary Behavior 38, 32-37.

This study analyzed the rectal and surface temperature of the horse's body, its heart rate variability parameters, and the step length when walking and trotting geriatric horses using blankets with various thermoinsulating properties. Twenty-four hot-blooded...

Melvin, M. V., Costello, E., Colpoys, J. D. 2020. Enclosed versus ring feeders: Effects of round-bale feeder type on horse behavior and welfare. Journal of Veterinary Behavior 39, 41-46.

In an effort to minimize the amount of hay wasted from a round bale, horse owners generally surround the bale with a round-bale feeder. While often necessary as a supplemental feed source, this feeding technique...

Rankins, E. M., Wickens, C. L. 2020. A systematic review of equine personality. Applied Animal Behaviour Science 231, 105076.

Examining the literature suggests equine personality is of interest to behavior and welfare scientists and those involved in the equine industry. Study and assessment of personality is critical because of the profound implications certain traits...

McMahon, S. A., Wigham, E. 2020. ‘All Ears’: A questionnaire of 1516 owner perceptions of the mental abilities of pet rabbits, subsequent resource provision, and the effect on welfare. Animals 10(10), 1730.

Pet rabbit welfare is a hidden crisis: Inappropriately housed, fed, and not routinely provided healthcare—rabbits can often suffer painful conditions and shortened lifespans. This study provides novel understanding of owners’ perceptions of rabbits’ mental capabilities...

Monckton, V., van Staaveren, N., Baes, C. F. et al. 2020. Are turkeys (Meleagris gallopavo) motivated to avoid excreta-soiled substrate? Animals 10(11), 2015.

The soiling of bedding on modern turkey farms combined with turkeys’ reduced ability and opportunity to perch and roost at elevation, forces them to spend most, if not all, of their time in contact with...

Felgenhauer, J. L., Brune, J. E., Long, M. E. et al. 2020. Evaluation of nutritional gel supplementation in C57BL/6J mice infected with mouse-adapted Influenza A/PR/8/34 virus. Comparative Medicine 70(6), 471-486.

Mice are a common animal model for the study of influenza virus A (IAV). IAV infection causes weight loss due to anorexia and dehydration, which can result in early removal of mice from a study...

Pallas, B. D., Keys, D. M., Bradley, M. P. et al. 2020. Compressed paper as an alternative to corn cob bedding in mouse (Mus musculus) cages. JAALAS 59(5), 496-502.

Bedding material is a critical component of the mouse environment and affects animal wellbeing and research integrity. Corn cob (CC) bedding has been a common bedding choice in research despite several potential negative aspects of...

Cantara, S. I., Blas-Machado, U., Zhao, X. et al. 2020. Comparative effects of 1/4-inch and 1/8-inch corncob bedding on cage ammonia levels, behavior, and respiratory pathology of male C57BL/6 and 129S1/Svlm mice. JAALAS 59(6), 695-702.

Corncob is a common bedding material used in laboratory rodents, but little is known about differences in the effects of the 2 available sizes on rodent models and health. This study compared the effects of...

Scarborough, J., Mueller, F., Arban, R. et al. 2020. Preclinical validation of the micropipette-guided drug administration (MDA) method in the maternal immune activation model of neurodevelopmental disorders. Brain, Behavior, and Immunity 88, 461-470.

Pharmacological treatments in laboratory rodents remain a cornerstone of preclinical psychopharmacological research and drug development. There are numerous ways in which acute or chronic pharmacological treatments can be implemented, with each method having certain advantages...

Woodard, C. L., Nasrallah, W. B., Samiei, B. V. et al. 2020. PiDose: An open-source system for accurate and automated oral drug administration to group-housed mice. Scientific Reports 10, 11584.

Drug treatment studies in laboratory mice typically employ manual administration methods such as injection or gavage, which can be time-consuming to perform over long periods and cause substantial stress in animals. These stress responses may...

Luz, M. P. F., Maia, C. M., Arruda, L. A. S. et al. 2019. Preference for heights of feeding troughs in mares: A pilot study. Animal Welfare 28(2), 205-214.

Preferences for the height of feeding troughs of seven mares were evaluated and, as awareness of surroundings when feeding is adaptive for horses, the relationship between preference responses and attention behaviours was also assessed. First...

Mejdell, C. M., Jørgensen, G. H. M., Buvik, T. et al. 2019. The effect of weather conditions on the preference in horses for wearing blankets. Applied Animal Behaviour Science 212, 52-57.

The use of blankets in horses is widespread in Northern Europe. However, horses are very adaptable to low temperatures and the practice is questioned because blankets may hamper heat dissipation at high temperatures and also...

Grau, C., Leclercq, J., Descout, E. et al. 2019. Ethanol and a chemical from fox faeces modulate exploratory behaviour in laboratory mice. Applied Animal Behaviour Science 213, 117-123.

Mice are macrosmatic animals that use olfaction as their main source of information to increase fitness; they process predator cues to assess risk, and plants and fruit cues to find nutritional resources and assess their...

Raspa, F., Cavallarin, L., McLean, A. et al. 2019. A Review of the appropriate nutrition welfare criteria of dairy donkeys: Nutritional requirements, farm management requirements and animal-based indicators. Animals 9(6), 315.

Data are available in the scientific literature concerning the quality and usefulness of donkey milk for human consumption. However, there is a lack of studies related to the understanding of the welfare of dairy donkeys...