Pets are big business. According to the American Pet Products Association, Americans spent $50 million on their pets in 2011. And as a pet owner myself, I often feel as if I am spending a good part of that $50 million on my best friend Morgan. When I first adopted her, I was prepared for the usual expenses related to dog ownership: food and treats, visits to the vet, pet insurance, a matching collar and leash, and of course a monogrammed coat for her to wear when it is....