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. 
Byrd, R., Boyd, S., Buckmaster, C. 2018. Rat thunder jacket— A zen experience. Laboratory Animal Science Professional 6(3) (September), 55-57.

Germ-free rats are fairly uncommon, relative to germ-free mice, and restraining these animals safely and effectively for compound administration and blood collection can be challenging. There are many commercially available varieties of restraint devices, but...

Hawkins, P., McBride, A., Paiba, G. et al. 2018. Report of the 2017 RSPCA/UFAW Rodent and Rabbit Welfare Group meeting. Animal Technology and Welfare 17(2), 75-83. [Meeting Report]

The RSPCA/UFAW Rodent (and now Rabbit) Welfare Group held a one-day meeting on 14 November 2017 in Weybridge, UK. The first session addressed meeting animals' needs and aiming for a 'good life', with the needs...

Häger, C., Keubler, L. M., Talbot, S. R. et al. 2018. Running in the wheel: Defining individual severity levels in mice. PLOS Biology 16(10), e2006159.

The fine-scale grading of the severity experienced by animals used in research constitutes a key element of the 3Rs (replace, reduce, and refine) principles and a legal requirement in the European Union Directive 2010/63/EU. Particularly...

Unakafov, A. M., Möller, S., Kagan, I. et al. 2018. Using imaging photoplethysmography for heart rate estimation in non-human primates. PLOS ONE 13(8), e0202581.

For humans and for non-human primates heart rate is a reliable indicator of an individual’s current physiological state, with applications ranging from health checks to experimental studies of cognitive and emotional state. In humans, changes...

Cronin, K. A., Bethell, E. J., Jacobson, S. L. et al. 2018. Evaluating mood changes in response to anthropogenic noise with a response-slowing task in three species of zoo-housed primates. Animal Behavior and Cognition 5(2), 209–221.

In the zoo environment, anthropogenic noise is common as sound levels fluctuate due to visitors, construction, habitat design, and special events. In this study, changes in the mood of three species of zoo-housed primates in...

Tavera-Mendoza, L. E., Brown, M. 2017. A less invasive method for orthotopic injection of breast cancer cells into the mouse mammary gland. Laboratory Animals 51(1), 85-88.

Breast cancer is the most common type of cancer diagnosed in women, and the second most common cause of cancer-related deaths in women in North America. The use of laboratory mice in research is an...

Krebs, B. L., Torres, E., Chesney, C. et al. 2017. Applying behavioral conditioning to identify anticipatory behaviors. Journal of Applied Animal Welfare Science 20(2), 155-175.

The ability to predict regular events can be adaptive for nonhuman animals living in an otherwise unpredictable environment. Animals may exhibit behavioral changes preceding a predictable event; such changes reflect anticipatory behavior. Anticipatory behavior is...

Larsen, R. A., Peveler, J. L., Klutzke, J. B. et al. 2017. Effects of daily restraint with and without injections on skeletal properties in C57BL/6NHsd mice. Lab Animal 46(7), 299-301.

Studies typically involve groups of animals that are injected with placebo compounds. As there are studies that demonstrate that restraint and injection can affect behavior and corticosteroid levels in rodents, the basis of such placebo...

Hubbard, J. S., Chen, P. H., Boyd, K. L. 2017. Effects of repeated intraperitoneal injection of pharmaceutical-grade and nonpharmaceutical-grade corn oil in female C57BL/6J mice. JAALAS 56(6), 779-785.

Due to potential adverse effects on animal wellbeing, the use of nonpharmaceutical-grade substances in animal research must be scientifically justified in cases where a pharmaceutical-grade version of the substance exists. This requirement applies to all...

Oliver, V. L., Athavale, S., Simon, K. E. et al. 2017. Evaluation of pain assessment techniques and analgesia efficacy in a female guinea pig (Cavia porcellus) model of surgical pain. JAALAS 56(4), 425-435.

Guinea pigs (Cavia porcellus) are a frequently used species in research, often involving potentially painful procedures. Therefore, evidence-based recommendations regarding analgesia are critically needed to optimize their wellbeing. Our laboratory examined the efficacy of carprofen...

Brenneis, C., Westhof, A., Holschbach, J. et al. 2017. Automated tracking of motion and body weight for objective monitoring of rats in colony housing. JAALAS 56(1), 18-31.

Living together in large social communities within an enriched environment stimulates self-motivated activity in rats. We developed a modular housing system in which a single unit can accommodate as many as 48 rats and contains...

Hawkins, P., McNeilly, A., Watson, J. et al. 2017. Report of the 2016 RSPCA/UFAW Rodent and Rabbit Welfare Group meeting. Animal Technology and Welfare 16(2), 77-86.

The RSPCA/UFAW Rodent (and now Rabbit) Welfare Group held a one-day meeting on 1 November 2016 at the University of Edinburgh and was attended by 70 delegates. Presentation topics included refinements in blood sampling rodents...

Ferguson, R. 3Rs improvements in the Bexsero® (Meningitis B) vaccine. Animal Technology and Welfare 16(2), 150-152.

Bexsero® is a new vaccine in the UK which since September 2015 has been added to the childhood immunisation programme for the prevention of Meningitis B. The in-vivo test as performed in Biological Services Division...

Forrest, G., Whitfield, L., Thapa, A. 2017. Refining the palpation technique to improve monitoring in the transgenic mouse. Animal Technology and Welfare 16(2), 153-154.

We have developed an accurate method of detecting and monitoring internal ovarian tumours. This reduces the number of procedures, refines the way we detect internal tumours and defines an end point before animals become visibly...

Jones, S., Paul, E. S., Dayan, P. et al. 2017. Pavlovian influences on learning differ between rats and mice in a counterbalanced Go/NoGo judgement bias task. Behavioural Brain Research 331, 214-224.

Judgement bias tests of animal affect and hence welfare assume that the animal’s responses to ambiguous stimuli, which may herald positive or negative outcomes, are under instrumental control and reflect ‘optimism’ or ‘pessimism’ about what...

Robinson, L. M., Altschul, D. M., Wallace, E. K. et al. 2017. Chimpanzees with positive welfare are happier, extraverted, and emotionally stable. Applied Animal Behaviour Science 191, 90-97.

Facilities housing captive animals are full of staff who, every day, interact with the animals under their care. The expertise and familiarity of staff can be used to monitor animal welfare by means of questionnaires...

Cooper, J. E., Hull, G. 2017. Gorilla Pathology and Health: With a Catalogue of Preserved Materials. Elsevier/Academic Print, London, UK.

Gorilla Pathology and Health: With a Catalogue of Preserved Materials consists of two cross-referenced parts. The first, the book itself, is a review of pathological changes and tissue responses in gorillas (Gorilla gorilla and G...

Perdue, B. 2017. Mechanisms underlying cognitive bias in nonhuman primates. Animal Behavior and Cognition 4(1), 105–118.

Recent research in nonhuman animals highlights the exciting possibility that performance on cognitive bias tasks might indirectly measure an individual’s subjective, affective state. Subjects first learn to perform a conditional discrimination task with two differentially...

Novak, J., Stojanovski, K., Melotti, L. et al. 2016. Effects of stereotypic behaviour and chronic mild stress on judgement bias in laboratory mice. Applied Animal Behaviour Science 174, 162-172.

Cognitive processes are influenced by underlying affective states, and tests of cognitive bias have recently been developed to assess the valence of affective states in animals. These tests are based on the fact that individuals...

Spangenberg, E. M. F., Keeling, L. J. 2016. Assessing the welfare of laboratory mice in their home environment using animal-based measures - a benchmarking tool. Laboratory Animals 50(1), 30-38.

Welfare problems in laboratory mice can be a consequence of an ongoing experiment, or a characteristic of a particular genetic line, but in some cases, such as breeding animals, they are most likely to be...

Pinnell, R. C., Almajidy, R. K., Hofmann, U. G. 2016. Versatile 3-D printed headstage implant for group housing of rodents. Journal of Neuroscience Methods 257, 134-138.

An unfavourable yet necessary side-effect of stereotaxic surgery involves the social isolation of post-surgery rats, in order to protect their wound site or skull-mounted implant from damage. Social isolation can cause a myriad of behavioural...

Hales, C. A., Robinson, E. S. J., Houghton, C. J. 2016. Diffusion modelling reveals the decision making processes underlying negative judgement bias in rats. PLOS ONE 11(3), e0152592.

Human decision making is modified by emotional state. Rodents exhibit similar biases during interpretation of ambiguous cues that can be altered by affective state manipulations. In this study, the impact of negative affective state on...

Finlayson, K., Lampe, J. F., Hintze, S. 2016. Facial indicators of positive emotions in rats. PLOS ONE 11(11), e0166446.

Until recently, research in animal welfare science has mainly focused on negative experiences like pain and suffering, often neglecting the importance of assessing and promoting positive experiences. In rodents, specific facial expressions have been found...

Miller, A. L., Golledge, H. D. R., Leach, M. C. 2016. The influence of isoflurane anaesthesia on the rat grimace scale. PLOS ONE 11(11), e0166652.

Over 234,000 rats were used in regulated procedures in the UK in 2014, many of which may have resulted in some degree of pain. When using animals in research, there is an ethical and legal...

Lang, A., Schulz, A., Ellinghaus, A. et al. 2016. Osteotomy models – the current status on pain scoring and management in small rodents. Laboratory Animals 50(6), 433-441.

Fracture healing is a complex regeneration process which produces new bone tissue without scar formation. However, fracture healing disorders occur in approximately 10% of human patients and cause severe pain and reduced quality of life...