The most important thing about providing first aid for a small mammal is that an ounce of prevention is worth a pound of cure. If your little critter is injured, there are some simple first aid procedures you can administer at home. These procedures may relieve your pet's immediate pain or discomfort and/or help prevent an infection that could threaten your pet's life. You must remember, however, that your pet's small size may limit the amount or quality of care you can provide at home. First aid is no substitute for professional veterinary attention.
For more information, please read
First Aid for Small Mammals.