Collars can be a help for a situation where the healing either hurts or is very itchy. I live with a self mutilating Elanora Cockatoo and it is needed to keep this otherwise happy and loving bird from requiring surgery to close the areas he opens up. He came to me (after several homes some of them not very good) having had two surgeries to repair all the damage to his chest. His diet, bathing and interactions are all improved from when we got him but he is not able to get out of this syndrome. Praying for a cure but till then wears both a jaunty jacket and a collar most of the time. If the vet suggested it try it and see if he will allow it to heal, spray mist or shower him frequently after removing it.