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. 
Weaver, H. L., Carbaugh, C. M., Madejczyk, M. S. et al. 2024. Comparison of tricaine methanesulfonate (MS-222) and alfaxalone anesthesia in zebrafish (Danio rerio). JAALAS 63(1), 74–80.

The research use of zebrafish has risen exponentially over the past decade while anesthetic options have remained largely unchanged.6 ricaine methanesulfonate (MS-222) is widely accepted as an anesthetic for routine husbandry procedures, however it has...

Hube, D., Bill, J., Knop, E. S. et al. 2023. Physical injuries and hair corticosterone concentration in rabbit kits from single- and group-housed does kept on a commercial farm. Animals 13(2), 196.

In intense breeding programs, rabbits are exposed to numerous stress factors which could affect their welfare and health. It has been suggested that group housing is more comfortable for does and similar to the living...

Kinally, A., Onions, L., Glenn, S. 2023. Validating the use of box training as a refinement to rabbit handling. Animal Technology and Welfare 22(1), 35–40.

In the wild, rabbits are prey animals and so the act of being picked up and handled can be extremely stressful for them. Yet, the most used method of handling laboratory rabbits is to grasp...

Kumar, P., Abubakar, A. A., Imlan, J. C. et al. 2023. Importance of knife sharpness during slaughter: Shariah and Kosher perspective and scientific validation. Animals 13(11), 1751.

Halal and kosher slaughter have given the utmost importance to the sharpness of knives during the slaughter of animals. A sharp knife of appropriate dimension (blade length) makes slaughter less painful during neck severance and...

Mauthe von Degerfeld, M., Serpieri, M., Bonaffini, G. et al. 2023. Intranasal atomization of ketamine, medetomidine and butorphanol in pet rabbits using a mucosal atomization device. Animals 13(13), 2076.

A non-invasive method of drug delivery, intranasal atomization, has shown positive results in human medicine and in some animal species. The objective of this study was to evaluate the effects of intranasal atomization, compared to...

Warwick, C., Pilny, A., Steedman, C. et al. 2023. Mobile zoos and other itinerant animal handling events: Current status and recommendations for future policies. Animals 13(2), 214.

Mobile zoos are events in which non-domesticated (exotic) and domesticated species are transported to venues such as schools, hospitals, parties, and community centres, for the purposes of education, entertainment, or social and therapeutic assistance. We...

Fontana, B. D., Alnassar, N., Parker, M. O. 2023. Transgenerational effects of early-life stress on anxiety behavior in zebrafish (Danio rerio). Behavioural Processes 208, 104874.

Early-life adversity impacts on anxiety-related behaviors in adulthood. The effects of such adversity not only affect the animal itself, but can be passed on transgenerationally. Pervasive effects of experimentally-induced early-life stress (ELS) have been documented...

Chakravarty, S., Donoghue, J., Waite, A. S. et al. 2023. Closed-loop control of anesthetic state in nonhuman primates. PNAS Nexus 2(10), 293.

Research in human volunteers and surgical patients has shown that unconsciousness under general anesthesia can be reliably tracked using real-time electroencephalogram processing. Hence, a closed-loop anesthesia delivery (CLAD) system that maintains precisely specified levels of...

Costa, R. S., Ciotti-McClallen, M., Tilley, R. et al. 2023. Intramuscular alfaxalone with or without buprenorphine or hydromorphone provides sedation with minimal adverse effects in healthy rabbits (Oryctolagus cuniculus) in a randomized blinded controlled trial. Journal of the American Veterinary Medical Association 261(2), 223–228.

OBJECTIVE To evaluate the effects of alfaxalone administered IM with or without buprenorphine or hydromorphone in healthy rabbits (Oryctolagus cuniculus). ANIMALS 24 male rabbits undergoing elective orchiectomy between August 21, 2021, and November 6, 2021...

Haertel, A. J., Beisner, B. A., Buehler, M. S. et al. 2023. The impact of housing on birth outcomes in breeding macaque groups across multiple research centers. American Journal of Primatology 85(11), e23554.

Demand for nonhuman primates in research has increased over the past several years, while nonhuman primate supply remains a challenge in the United States. Global nonhuman primate supply issues make it increasingly important to maximize...

Philippe, C., Vergauwen, L., Huyghe, K. et al. 2023. Chronic handling stress in zebrafish Danio rerio husbandry. Journal of Fish Biology 103(2), 367–377.

The zebrafish (Danio rerio, Hamilton, 1822) is one of the most important fish model species in scientific research, with millions of fish housed in laboratory animal facilities around the world. During husbandry, it is necessary...

Shishis, S., Tsang, B., Ren, G. J. et al. 2023. Effects of different handling methods on the behavior of adult zebrafish. Physiology & Behavior 262, 114106.

The zebrafish is an important biomedical research organism. In most research, zebrafish are removed from their home tank and subsequently their phenotype is measured. The method of handling the fish, however, may significantly affect a...

McIndoe, K. S., Saunders, R., Blackwell, E. J. et al. 2022. The effect of blindfolding and swaddling on the stress response to handling in domestic rabbits. Animal Welfare 31(1), 27-36.

Stress during handling can negatively impact the welfare of an animal. Gradual habituation or systematic desensitisation can reduce this but is not always possible. Blindfolding has been shown to decrease stress indicators, including heart rate...

Leyden, C., Brüggemann, T., Debinski, F. et al. 2022. Efficacy of tricaine (MS-222) and hypothermia as anesthetic agents for blocking sensorimotor responses in larval zebrafish. Frontiers in Veterinary Science 9, 864573.

Tricaine, or MS-222, is the most commonly used chemical anesthetic in zebrafish research. It is thought to act via blocking voltage-gated sodium channels, though its mechanism of action, particularly at the neuronal level, is not...

Buckmaster, C. L., Levesque, D., LaFollette, M. et al. 2022. Five hot topics in refinement of nonhuman primate neuroscience research. Laboratory Animal Science Professional 10(1) (January/February), 24-26.

Members of the North American 3Rs Collaborative (NA3RsC) refinement initiative have chosen to summarize developments in five hot topics of interest: 1. Tips for welfare-friendly transport, chairing, and restraint; 2. Guidance on refining food and...

Guerrero-Martin, S. M., Brill, S., Carlson, B. W. 2022. Development and implementation of a positive reinforcement training program for nonhuman primates in biomedical research. Laboratory Animal Science Professional 10(1) (January/February), 48-52.

Despite clear benefits of PRT for NHPs and biomedical research, investigators often view the investment in personnel expertise and time required to train animals as deterrents towards adopting PRT. We provide an example of how...

Goldsmith, R., Wilson, C. 2022. Does environmental colour matter to Zebrafish. Animal Technology and Welfare 21(3), 234–237.

The aim of this study was to determine if environmental colour affects the Zebrafrish (Danio rerio) performance metrics of survival, growth rates, fecundity, and fertility. This study created tanks of different colours (green, blue, and...

Suba-Bokodi, É., Nagy, I., Molnár, M. 2022. Changes in the stress tolerance of dwarf rabbits in animal-assisted interventions. Applied Sciences 12(14), 6979.

Background: Rabbits are common companion animals in many European countries. Rabbit-assisted interventions in primary schools are suitable for decreasing the anxiety levels of children, which may increase the education efficiency of teachers. Methods: In our...

Owen, J. P., Kelsh, R. N. 2021. A suitable anaesthetic protocol for metamorphic zebrafish. PLOS ONE 16(3), e0246504.

Zebrafish are frequently used as a means to investigate development. These studies increasingly require repeated anaesthesia of zebrafish during juvenile (i.e. metamorphic) stages. The effects of anaesthesia during this time remain poorly studied. The aim...

Chaumont, S., Freitas-de-Melo, A., Pinto-Santini, L., Menant, O. et al. 2021. Rams recognize and prefer the human who regularly brushed them. Applied Animal Behaviour Science 236, 105250.

Brushing produces a relaxing effect and improves the welfare of ewes and lambs and the human-animal relationship. Lambs gently handled during rearing are less fearful to humans in their adulthood, but there are few studies...

Sørensen, D., Cloutier, S., Gaskill, B. (Eds.). 2021. Animal-centric Care and Management - Enhancing Refinement in Biomedical Research. CRC Press, Boca Raton, FL.

The concept of the 3Rs (Refinement, Reduction and Replacement) has been used as a framework for improving the welfare of laboratory animals for the last half century. By establishing an animal-centric view on housing and...

Haertel, A. J., Schultz, M. A., Colgin, L. M. et al. 2021. Predictors of subcutaneous injection site reactions to sustained-release buprenorphine in rhesus macaques (Macaca mulatta). JAALAS 60(3), 329-336.

Subcutaneous injection site reactions to sustained-release buprenorphine hydrochloride (Buprenorphine SR) in macaques have been reported in only a single case report. In the current study, we evaluated the incidence rate and predictors of buprenorphine SR...

Wilson-Welder, J. H., Frank, A. T. 2021. Use of food enrichment for medication delivery in large groups of sheep. Laboratory Animal Science Professional 9(3) (May/June), 40-43.

In a 2018 AALAS webinar on Sheep and Goat Analgesia, Dr. Susie Vogel, a small ruminant expert, introduced the concept of getting sheep and goats to willingly take medication by putting it in a tasty...

Small, A., Marini, D., Colditz, I. 2021. Local anesthetic delivered with a dual action ring and injection applicator reduces the acute pain response of lambs during tail docking. Animals 11(8), 2242.

Docking the tail of lambs is a standard husbandry procedure and is achieved through several techniques including clamps, hot or cold knives and latex rings, the last of which is the most popular. All tail...

Falendysz, E. A., Calhoun, D. M., Smith, C. A. et al. 2020. Outside the box: Working with wildlife in biocontainment. ILAR Journal 61(1), 72-85.

Research with captive wildlife in Animal Biosafety Level 2 (ABSL2) and 3 (ABSL3) facilities is becoming increasingly necessary as emerging and re-emerging diseases involving wildlife have increasing impacts on human, animal, and environmental health. Utilizing...