My husband and I have taken in my in-laws cat. He's been neutered, not sure how long ago. He's about 7 years old. They found him in a storage facility. He was already neutered at that point. They've never mentioned him spraying but I've noticed him doing this a couple times. The neighbor downstairs has a female cat. Is it possible for a neutered male to spray in response to the female? We both have our windows open, maybe he can smell her.:?