Disclaimer- I am not looking to replace a vet’s opinion, just asking to satisify my own curiosity.
A self care boarder has 2 broodmares due to foal the end of May. Both were confirmed in foal via ultrasound in June. Mares moved to my farm the end of June. The older mare (this would be her 7th foal) showed signs of heat in July and August, lasting 3 or 4 days, about a month apart. Owner was informed of this. Not concerned, saying it’s common for a bred mare to do that. Didn’t notice if she did it again. Fast forward to last week - mare doesn’t look any larger AT ALL then she did when she first arrived. Also seemed to be in a full blown heat for 4 days - wouldn’t leave the fence line she shares with a studdy gelding. Lots of squirting, squealing, flagging tail. Owner still not concerned about having her ultrasounded again. He’s 100% sure she’s pregnant.
2nd mare is young, due with her first foal. Haven’t noticed any signs of heat in her. She also is not any larger then when she first arrived. Also had laminitis over the winter. Stall bound for 3 months. Owner began questioning if she was in fact in foal. Had vet run blood work - results said NOT in foal. Owner said results can be sketchy - still believes she is in foal.
So, just to satisify my own curiosity, (as I have next to no experience with broodmares) have any of you had any of the above situations occur and still have the mares in foal? Common behavior for them or not?