Ah well, would need more info to be able to guesstimate or offer any suggestions. Maybe your vet can wring more information out of the situation.
Best wishes.
So, the pectoral muscles themselves are really hardened, I take it? I'm sorry, I'm not sure what you mean by the last bit. 'Packed in'?
Generally if there is some disorder causing such tightening of the muscles, there are a few suspects. Any recent injuries could have given her some variety of...
What do you mean by stiff breast? Really need more info on that.
The squeaking is not an awfully good sign, chances are in this case it's related to her stiff breast, but hard to hazard a guess without knowing what exactly a stiff breast is. Are the muscles in spasm? Are you referring to her...