My little Pumpkin had an anal gland infection a while back. We expressed brown purulent fluid from it. She was seen by a vet and at that time given antibiotics. Since then her hair around her anal area is always stained. Like tear stains. I cut it off and it comes back. She has taken Glandex. But that doesn’t stop this awful staining. She looks she has poop on her butt all the time. Anyone know how to get rid of this? She is white with a slight touch of apricot.