Thank you all for your kind thoughts. I really want to clean the spots also. The vet told me not to though because he's not sure what's underneath (I'm honestly frustrated that he can't do more to figure it out). He said that his life is riding on the 50/50 chance that there is new skin underneath it. If it's muscle under there, he said that Howard will not make it because it's such a large area. We all have our fingers crossed that it's new skin. But I just really don't think it is. Waiting for the blister to open is literally killing me inside because I know I'm going to have to see what's under there soon and I just don't think it's going to be what I want.

He has plateaued at 124g and hasn't gained any more weight from the tube feeding. He is still on antibiotics, but only has two treatments left of it.

But! I don't understand, honestly, why the vet wouldn't just take a syringe and suck some of it out to see what exactly it is. Surely a tiny spot of penetration couldn't hurt him that much because I've been giving him antibiotic injections. If someone could explain that to me, I would appreciate it so much.