So yesterday, I was checking our flock and noticed my rooster wasn't as active as he used to be. I decided to check him for problems and so mites, so we gave him a bath and that's when we saw something else that may or may not be causing the problem (Most probably it is the one causing the problem), But I don't know what it is, we're planning on sending him to the vet within this week, But I need to know what this is as it might need urgent attention. (The yellowish lump right above the left wing) Here's a somewhat better view, (It look's like a bubble gum and it looks soft and has a somewhat pinkish color inside) Right now, he's staying in our laundry room (Cleanest room in our house, with a good drainage system in case he makes a lot of droppings) separated from the others, and his droppings are somewhat wattery, also his comb is getting dark (not bluish just plain dark). By the way his name is Kaber(The name was taken from his breed) and he is just about 1 year old. What do you guys think is on his wing? Please let me know I'm worried.