Animal Massage: Touching All Creatures, Great and Small, by Shirley Vanderbilt
I Am the Walrus: Massage and the Exotic Animal, by Kieran McConnellogue
Peter Cottontail Should Have Had a Massage, by Karrie Osborn
AltVetMed.org: information about complementary and alternative therapies in veterinary medicine (CAVM).
House Rabbit Society: many resources for rabbit care.