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Discussion on Mare Teasing Mares and Acting like Stallion
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Member:
mtca
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Posted on Tuesday, Apr 19, 2011 - 11:22 am:
Dr. O,
I have read through your Behavioral articles and I have a mare that is 25 years old acting like a stallion that came to me due to some very bad injuries for aftercare. She has been sweet and now that she is healed she acts just like a stallion. when I take her out of the barn to her pasture with another 25 year old mare. She teases the other mares across the fence and if you put a halter on any mares to take one out of the pasture (none of these are bred, they are all boarded horses) she immediately starts talking and will mount my 25 year old mare. This started about 2 weeks ago and she is not in heat. Is there anything I can give her to get her hormones under control?
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Member:
theresab
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Posted on Tuesday, Apr 19, 2011 - 6:35 pm:
I may be totally off base here but maybe it's more dominance than aggression. If she's new to the herd she may be trying to establish her rank. I know my alpha mare squeals and strikes out when she's introduced to new horses across the fence and loves to talk to new horses as we ride, whereas my lower ranked mare is less interactive. If she's feeling better she may be trying to take a new position. I haven't dealt with the mounting behavior personally so I'm just guessing. I've heard female dogs will mount other dogs for dominant status. Maybe it will get better with time as she gets more comfortable.
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Member:
mtca
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Posted on Tuesday, Apr 19, 2011 - 7:46 pm:
Thanks TheresaB, we use to have stallions and breed horses and I really thought it was a hormone causing it. I have seen pregnant mares mount other mares but it was short lived. This mare has been here since Jan 28th, I suppose anything is possible.
Does anyone have any thoughts on hormones causing this?
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Member:
mrose
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Posted on Tuesday, Apr 19, 2011 - 8:18 pm:
You could have her levels tested with blood work. Is she acting like this only when she's in season? Or, is she constantly in season?
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Moderator:
DrO
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Posted on Thursday, Apr 21, 2011 - 1:11 pm:
Hello Linda,
One should always consider granulosa cell tumors in cases like these, HorseAdvice.com » Diseases of Horses » Reproductive Diseases » Trouble Settling Mares & Stallion Infertility » Granulosa Cell Tumors in Mares. If you would like to try to determine if the transitional estrus cycle is responsible you could go with a two week course of ReguMate to see if the behavior stops. I would first recommend a ultrasound exam however.
DrO
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