Thanks for everyone’s replies. I think it must be a form of blister. There are no vets around here who deal with chickens. I’m wondering if I just leave it whether it will pop and then it’ll heal. I’ll clean the wound daily with antiseptic. What do you think?
One of our 18month old hens has developed a very horrible looking large lump just below her chest (see pictures). It's round and indented at the end . I thought it was something to do with her crop at first, but I think it is too low down. She's eating and behaving normally - although she's not...
