dogs

Question
what is wrong when a dog has a swollen bubble
on its chest.

Answer
Sorry, Cornelius but diagnosing an issue without even seeing the dog is not possible for anyone. There are soo many things that it could be. I suggest that you try to find a holistically oriented vet in your area and have the vet do diagnostics, that is what they are for, and a holistic vet will better be able to offer you a cure for the issue without as much expense and risk.

Sue