So I just realized this today when I was feeding my pancakes that one of them had a kind of lump around his neck and it's slightly red. I have never seen this before and I am worried, anybody here knows what it is? Do I have to separate him from the group? Do I have to go see a vet or does it heal naturally? Also what could have caused this? I have attached some pictures. Can you please answer asap because I m going on a holiday for a few days tomorrow but I have someone that takes care of them and I need to know if I have to bring him to the vet. Just to let you guys know he was eating without any problems.

Thank you


Thank you