An abscess is an infection that festers and contains pus. It will either break open on it's own or can be lanced and drained. A cyst to me is a growth, that can be filled with fluid or tissue. It really doesn't matter, as long as the incision looks good, it should not be infected. I sure hope...
Did the vet think it was an abscess? How does the incision area look? Antibiotics can affect the appetite. I would continue to tube feed. Just get an extra pair of hands and get it over with quickly a couple of times a day. Probiotics would be good to get the gut bacteria back to normal, if...
Good job--looks like it could be a core of hardened puss which is common in chickens, kind of like what is found with bumble foot. Peroxide does great to fizz out the inside of a crater, then apply some antibiotic ointment daily.
That's great that she was vaccinated for Mareks. It's not 100% effective, but that is good she had it. To soak the tumor, you could apply some warm soaks with a wash cloth, or if you can dry here afterward, you could soak the wound or even give her a bath, but be sure to get her dry and keep her...
Are you and the vet sure that this is an abscess, and not a tumor? You can debride the dead skin off an abscess with daily soaks and gentle scrubbing with cloth or gauze. Peroxide can be good a time or two, but it would help to use a little betadine, hibiclens, or just saline. Then apply an...
Breast blisters may become abscessed, and the common bacteria are staphylococcus or E. coli. Tylan may help, but your vet could probably prescribe better antibiotics specifically for those bacteria. Enrofloxacin or Baytril would be good. Procaine Penicillin is good for staph. Tylan is not good...
Welcome to BYC. It sounds like she had an abscess, and you treated it well. Was the abscess in the middle near her breast bone? Does she lie down a lot, or roost on the floor at night?