Why is my male chihuahua dog so over protective with my female chihuahua dog?

How long does a female & a male dog stay tied up when they get together?

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...

if dogs are stuck together do they still get pregnant? Like the male dog still ejaculates, or what?

We have a male dog and a female dog and my female dog is in heat and they have gotten stuck quite a few times already. My mal...

why is my male Chihuahua humping my female chihuahua. she came into heat and I found them stuck together 3 weeks ago so im pr...

I have a 2yr old male chihuauaha who is neutered and just got two more that are 8 weeks old. a female and male. my male is...

My parents have a male pomeranian/chihuahua puppy and an older female lab/cross and wish to get another pom/chi, would it be ...

I have a 4 month old, german shepard/pitbull mix and I wanna know at what age can he get a female dog that is already in heat...

can a female dog in heat make another female dog go into heat?

I have always had male dogs . Are females harder to train as far as house breaking and what can I expect from a chihuahua-ter...