Hormones that a male dog can smell if female is pregnant?

My 2 yr old Shi Tzu may be pregnant….but my 3 yr old male shi tzu acts as if she is in heat? Is there some kind of hormone that my male can smell?

Answer #1

Yes, dogs know when other dogs are in heat, hence their acting up, etc…if you don’t want them doing, um, stuff, then you can get the male shitzu neutered.

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