Rodent

Comparison of 2 gentling programs for laboratory rats: Effects on the behavior toward humans

Gentling can reduce the fear reactions of young laboratory rats toward people long term. We were able to show this outcome in a previous study that involved a successful but elaborate gentling program. In the study at hand, we investigated...

Year Published: 2016Topics: HandlingAnimal Type: Rat, Rodent

Citation: Schneider, B. M., Erhard, M. H., Scheipl, F. et al. 2016. Comparison of 2 gentling programs for laboratory rats: Effects on the behavior toward humans. Journal of Veterinary Behavior 12, 73-81.

Fur chewing and other abnormal repetitive behaviors in chinchillas (Chinchilla lanigera), under commercial fur-farming conditions

Fur chewing is a behavioral disorder frequently reported in chinchillas kept for fur-farming purposes. Rodents kept in barren cages usually develop some form of abnormal repetitive behavior, which can indicate a past or present welfare problem. Fur chewing may not...

Year Published: 2016Topics: Abnormal/Problematic BehaviorAnimal Type: Chinchilla, Rodent

Citation: Franchi, V., Aleuy, O. A., Tadich, T. A. 2016. Fur chewing and other abnormal repetitive behaviors in chinchillas (Chinchilla lanigera), under commercial fur-farming conditions. Journal of Veterinary Behavior 11, 60-64.

Technician spotlight: Jessica Brekke’s “rat hammock” design

This article describes how to make an inexpensive 'rat hammock' out of PVC tunnels for standard-housed laboratory rats.

Year Published: 2019Topics: Environmental EnrichmentAnimal Type: Rat, Rodent

Citation: Animal Welfare Institute. 2019. Technician spotlight: Jessica Brekke's “rat hammock” design. AWI Quarterly 68(4) Winter, 9.

Let’s get serious about animal play

This article describes the importance of providing laboratory animals with opportunities to engage in play, and provides a few practical ideas for how to do this.

Year Published: 2019Topics: Environmental Enrichment, Natural BehaviorAnimal Type: All/General, Baboon, Capuchin, Chimpanzee, Lemur, Macaque, Marmoset, Nonhuman Primate, Other Nonhuman Primate, Owl Monkey, Rat, Rodent, Squirrel Monkey, Vervet (African Green Monkey)

Citation: Animal Welfare Institute. 2019. Let's get serious about animal play. AWI Quarterly 68(3) Fall, 19.

Assessing the safety and suitability of nesting material for singly housed mice with surgically fitted head plates

Nesting material, for example shredded paper, is a common form of enrichment for laboratory mice. However, there has been limited research performed regarding its apparent safety when given to mice fitted with exteriorised devices such as head plates. Anecdotally, shredded...

Year Published: 2019Topics: Environmental Enrichment, External Bodily EquipmentAnimal Type: Mouse, Rodent

Citation: Windsor, Z., Bate, S. T. 2019. Assessing the safety and suitability of nesting material for singly housed mice with surgically fitted head plates. Heliyon 5(7), e02097.

Welfare and scientific considerations of tattooing and ear tagging for mouse identification

Ear tagging is perceived as less painful or stressful than tattooing and therefore is generally considered less harmful or costly to welfare. However, ear tags are more difficult to read than tattoos and can fall out, and mice usually require...

Year Published: 2019Topics: Identification MethodAnimal Type: Mouse, Rodent

Citation: Roughan, J. V., Sevenoaks, T. 2019. Welfare and scientific considerations of tattooing and ear tagging for mouse identification. JAALAS 58(2), 142-153.

Evaluation of a synthetic bedding substrate for mice (Mus musculus)

This study compared a synthetic bedding substrate (SBS), which has the potential to be a particulate-free animal bedding system, with the standard woodchip bedding. The objective was to demonstrate that the SBS is habitable for mice and reduces particulates to...

Year Published: 2019Topics: Housing, Husbandry & ManagementAnimal Type: Mouse, Rodent

Citation: Bellin, M. A., Reitnauer, K. J., Gomez, A. M. et al. 2019. Evaluation of a synthetic bedding substrate for mice (Mus musculus). JAALAS 58(2), 154-159.

Time-dependent pathologic and inflammatory consequences of various blood sampling techniques in mice

We compared 6 frequently used mouse blood-sampling methods (lateral tail incision; tail-tip amputation; sublingual, submandibular, and saphenous vein puncture; and retrobulbar sinus puncture during isoflurane anesthesia) with regard to induction of local and systemic inflammation, stomach contents, weight changes, and...

Year Published: 2019Topics: Biological Sampling & Physiological MeasurementAnimal Type: Mouse, Rodent

Citation: Sørensen, D. B., Metzdorff, S. B., Jensen, L. K. et al. 2019. Time-dependent pathologic and inflammatory consequences of various blood sampling techniques in mice. JAALAS 58(3), 362-372.

Assessment of pain associated with the injection of sodium pentobarbital in laboratory mice (Mus musculus)

The AVMA Guidelines for the Euthanasia of Animals considers injection of barbiturates to be an acceptable method of euthanasia in rodents but states there is a potential for pain when administered intraperitoneally. This study examined the potential for pain in...

Year Published: 2019Topics: Drug/Substance Administration, EuthanasiaAnimal Type: Mouse, Rodent

Citation: Dutton III, J. W., Artwohl, J. E., Huang, X. et al. 2019. Assessment of pain associated with the injection of sodium pentobarbital in laboratory mice (Mus musculus). JAALAS 58(3), 373-379.

Clinical, physiologic, and behavioral evaluation of permanently catheterized NMRI mice

Vascular catheterization is becoming a popular technique in laboratory rodents, facilitating repetitive blood sampling and infusion in individual animals. In mice, catheterization is complicated by their small body size, which may increase the risk of postoperative complications that may both...

Year Published: 2019Topics: Cannulation, Catheterization, & IntubationAnimal Type: Mouse, Rodent

Citation: Falkenberg, M. K., Teilmann, A. C., Henriksen, T. et al. 2019. Clinical, physiologic, and behavioral evaluation of permanently catheterized NMRI mice. JAALAS 58(3), 380-389.