In the case of my grandfather, multiple times we caught the doctor prescribing expensive prescriptions when more effective generics were available. In the case of my dog, my local vet pushes for Purina pet food[1] and vaccines when my doc is regularly titered. She is oblivious or fails to acknowledge the risks of a Lyme Vaccine carries [2] and serious allergic reactions that her recommended flea control can cause.
The only way to guarantee the best health care for yourself and your pet, is to educate yourself.
[1] http://www.aplusflintriverranch.com/define-menufoods-petfood...
[2] http://www.alldogsgym.com/health-and-nutrition/articles/heal...