As has been pointed out, a fungus is the more likely.
Another thing I want to ask is if there is a way for Harry to eat more vitamin C.
I feed him mini sweet bell peppers (usually yellow and red), chopped. But lately, he is not a fan of them.
So I give him a vitamin C tablet from Amazon, and tangerines. I wonder if there is any other veggies for vitamin C?
Thank you in advance.
Hope everyone is safe and well.
There is a sortable chart here: