I had one come into the rescue that had been produced by a local breeder who sold them to pet stores. She was fine right up until around she was a year old, and then I came home one night and she was gasping for breath and couldn't breathe. We rushed her to the emergency vet, and it turned out she had an enormous tumor pressing against her lungs. It was an awful way to have to go. We helped her over the bridge.
We are as gods to the beasts of the fields. We order the time o' their birth and the time o' their death. Between times, we ha' a duty. - Terry Pratchett.
"Men have forgotten this truth", said the fox, "But you must not forget it. You become responsible, forever, for what you have tamed. - Antoine de Saint-Exupéry