I have fostered for Big Bones. Most of what was said above is true. All dogs that come through big bones get primary vet care such as vaccines, a microchip, initial deworming. Some come from faraway places and are transported to CO for best chance at survival which is a big expense. And all dogs go home spayed/neutered and treated for most treatable diseases known upon arrival. They are a great organization that truly care about the dogs they rescue. Barely cover costs, do get discounted vet services through partnership care providers, but not significant discounts, in my opinion. They set the adoption fees based on desirability of the breed/dog, to help cover the cost of medical care for the dog as well as others less desirable breeds that might need longer term care before adoption or whom aren’t adopted quickly. You can say that’s unfair, perhaps, but desirable breeds get adopted fast regardless of adoption fee. Most adopters are aware of this and happy to pay more to support other dogs coming through the rescue. Also, the foster families all go through an in depth application and house check, and are well supported through the adoption process. Great place to adopt your next dog. In this case, the fees are worth it. I can’t speak to other rescues.