You could say OCD is a disease of the brain, and as dogs have brains as well, I don't think it's impossible that they'd suffer from a similar 'disease'. Maybe

You could say OCD is a disease of the brain, and as dogs have brains as well, I don't think it's impossible that they'd suffer from a similar 'disease'. Maybe I just misunderstood what you were trying to say though, but I do agree that you should not treat them as human children. (I have OCD myself (2 decades+) and it is a horrible thing to live with.)