Don't Count Your Chickens (or Pups) Before They're HatchedWell,
disappointment again. No puppies. You might wonder why we could make
such an 'obvious mistake'. But it's really not so obvious.When
a female dog, who is descended from wolves and retains some of their
traits, goes into heat, she will often begin to show first signs of
pregnancy.That's
why vets can tell around the 21st day if the...