I've said it before, and I'll say it again -- animals are so much more adaptable and accepting of their circumstances than we humans are. They don't KNOW that they should have 4 legs -- they just deal with what they have.
Little Two Paws was born with only a front and back leg on the right, nothing front left, and what I call his little nubbin for a back left, as well as his tail being short and stubby.
The breeder referred to it as a "birth accident", since if the mom has trouble delivering her kits and has to grab onto and pull whatever is sticking out, their little limbs are so tiny and fragile that they sometimes get bitten right off.
I took him to the vet for a well baby checkup, and Dr. Fitzgerald said that it wasn't necessary to further amputate the nubbin up to the hip, since he was able to use it to get around.
It looks kind of like the bottom of a chicken drumstick. It is not an open wound, but it is very tender, pink skin with no fur covering it and it is easily irritated, so he lives completely on fleece covered everything and we have playtime on a flannel sheet on my bed.
He doesn't run on a wheel, but when I asked the rancher who wanted me to take him as a pet how he got around with only 2 legs, he replied, "Well, I reckon pretty good." And he DOES get around pretty good, kind of skittering around. He's surprisingly very fast!!!
I have him in a small one level guinea pig cage with a shelf, a hammock, a fleece tube and corner house from Alli, a cuddle cup and a potty pan.
I think that what you do is up to you, but without knowing why he has had to have 2 amputations, I would say only that I would not be so quick to put him down, if he will still be able to have a decent quality of life. Little Two Paws is the sweetest and most loving chinnie, and I just know that he's happy that he had a chance to have a great life with me!!! :thumbsup:
Good luck with your little guy -- maybe now Little Two Paws won't be the only little 2 legged chinchilla in the world!!! With a smaller cage and some other adaptations, he could probably "get around pretty good"!!!
ETA: WOW!!! Cool ferret wheelchair!!! I don't know if a chin could use one because their front paws are so little and they really hop more than walk.