Darly is in grave condition… the vet suspects infection by mycobacteria. They are doing a culture to identify the bacteria.
The wound seemed to be healing and he had been eating on his own and taking the meds… looked bright… then today I noticed pus not only oozing from the wound but also from other parts of his belly! As Dr Girisha Lakhiani (aka Dr. G.) from Mt Pleasant Vet Center explained, the layer under the skin has been infected and the infection is spreading… most probably caused by mycobacteria. She compared it to human leprosy. They are going to open the stitches and put him on drip. Darly will need several surgeries… if he responds to treatment.
The other option would be PTS… but I want to let him have a chance even if it is a small one. His eyes look bright and he can sit up and eat! Even the vet commented that Darly is a very good-natured cat!