Bedding can be sawdust, paper, shavings and should be dust-free and inedible Avoid pine or cedar shaving as these may affect the mouse s liver. Temperatures of the room should be between 65 F and 80 F. Mice tend to drink lots of water and, therefore, urinate a lot. Cages need to be changed as often as necessary, but at least twice a week. The mice are very sensitive to the build up of ammonia from the urine. Mice are social animals and do much better in groups of 2-6 animals.
Mice living alone tend to be more aggressive.
However, two male mice living together tend to fight and may continue to do so even after living together for quite a while. Introduction into male only groups at weaning may be acceptable if the cage is large and there are lots of escape places for hiding. Neutering will help this situation, but the easiest solution is to keep female mice only. Feeding can be free choice and water should always be available. Do not pick a mouse up by the tip of its tail or you may pull the skin off.