mace for chihuahuas

Waiting in the checkout line buying some dog food, this guy struck up a conversation about the chihuahua my daughter was carrying.├é┬áDiscipline hadn’t come up at all, but out of nowhere he starts talking about macing dogs.

Stranger: What you’ve gotta do is mix up some vinegar and water in a spray bottle. It’s like mace for dogs. Works great with mine.

Me: You… mace your chihuahua?

Stranger: Well, you’ve gotta catch ’em doing something though.

Me: Sure, sure… Where did you say you worked?

Stranger: Down at the prison.

Me: Oh, ok… (nods and avoids eye contact)