AB, I agree with you, although I am guilty of not doing it myself. When I got Freyja, I knew she had been pastured with the stallion since Finn's birth (2 months time). The owner was getting rid of Freyja because she had not bred, and they figured she was in too poor of shape to breed back. The owner never saw heat or "saw the stallion breed her", or show any real interest in Freyja. I also, was inclined to think there was no way poor Freyja could have taken in the condition she was in, so I never had her checked - my bad. I didn't find out she WAS in fact bred until many months later - too late, at that point, to flush. Had I known earlier, I would have had it done, because Freyja was in such poor shape she should not have carried another foal. Live and learn.
To the OP - get the vet out to check the mare out. Not only to confirm pregnancy, if she is, but you also want a vet to be seeing her through her pregnancy, so when time comes to deliver you have a vet already familiar with your horse and her health, in case there are problems with the delivery.
Last edited by Indyhorse; 11-17-2010 at 10:12 AM.