How To Know If Your Dog Is Pregnant Pitbull. (it’s caused by hormone changes.) A problem can be as simple as not understanding why your dog is out of nowhere lactating.
According to the dog park website, one of the first signs of pregnancy in a dog is an increase in appetite. An ultrasound can detect fetal heartbeats, thus your veterinarian may the estimate the number of puppies your dog is carrying.
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An ultrasound is the best way to find out if a dog is pregnant early on in gestation. Anything out of the ordinary could be a sign of dog pregnancy.