Our neutered tom has had a series of losing encounters with a neighbourhood cat (now gone) which have left him with a torn scalp. We have been to the vet several times to have him stitched up and the last time she cut the skin flap off and kept him in a cage for 3 weeks hoping it would heal over. It didn't, she gave up, and we have taken the cat home. He had a missing lump of scalp about 2 cm diameter with raw flesh showing. We kept him in a protective collar for weeks, but it didn't do any good and just made him miserable, so now we have taken it off.
He seems perfectly happy and normal, and washes the area with no sign of pain or distress. It does appear the gap is closing slightly in from the sides, but I am mystified as to why the open wound isn't healing. We occasionally wash it with mild disinfectant, and that doesn't bother him either.
Any ideas as to how to accerate the healing process? It's been like this for 3-4 months now.