Today when I let Rob, my cat in, I felt something matted on his neck. I thought it was just something gross he got into, and I mentioned it to my husband and forgot about it.
Paul looked at him and found the matting was dried pus (not blood), and there is an OPEN HOLE in the cat's neck. It's not bleeding, it doesn't look bloody, it just looks like... a hole in his skin. All the hair is gone from the area. Both of us half-screamed and jumped away the first time we saw it. It looks like a pore or a fish mouth. I've never seen anything like it. Paul called the emergency vet number and they told him to come tomorrow during walk-in hours. I don't think they grasp the bizarre-ness of a gaping hole in my cat. YOU CAN LOOK INSIDE IT.