My mare has always had a tendency to do this, especially in the summer. This winter, she urinated near her hay, but not directly on it. Now she's gone to directly on it.
It doesn't seem to matter if more bedding is added. If they hay is contained somehow off the ground, in a rack or bag (which I don't like to do, but for waste reasons we tried it) she still urinates on the dropped hay. The hay is good quality first cut, and even so, the one so-so batch we got a while back she did not urinate on.
She does not urinate on her hay outside, only in the stall. It does seem that certain stalls she did it more than others. She has always had a good appetite and has not refused hay in recent memory, so when I leave her in the evening she is always eating contentedly.
What other motivation would a horse have to urinate on their hay?
Last edited on Wed Jun 18th, 2014 06:15 pm by Redmare
Interesting question. I used to own a gelding that urinated on hay in the dirt lot. I guess he was marking it because there was an area that the horses used for a toilet that every other horse used. He tried to dominate all the other hay piles so maybe it is one way to dominate more than one hay pile. He lived in a lot with a run in shed and 2 other horses. About a one acre dirt lot with 3 acre pasture.