Companion Animals (dogs and cats)
The Center for Veterinary Medicine (CVM) regulates the manufacture and distribution of food additives and drugs that will be given to animals.
http://www.fda.gov/AboutFDA/CentersOffices/CVM/default.htm
U. S. Food and Drug Administration Veterinary Newsletter. Taking the bite out of fleas and ticks.
http://www.fda.gov/AnimalVeterinary/NewsEvents/FDAVeterinarianNewsletter/ucm130778.htm