Is it possible for a dog which has been spayed to still come into heat?
My old schnauzer cross had already been spayed when we got her around 10 years ago (she's 13) but over the years she has marked in the house a smell that is very strong and smells like rotton fish.
I have noticed also that right now her girly bits have gotten larger, is it possible that she could be in heat? I didnt think a spayed bitch would be able to come into heat?