How long can horses lie down at a time? Bella was down for 45 minutes this afternoon. She was lying completely on her side, would raise her head for a few minutes then lay it back down. (This was according to the barn owner) She wasn't thrashing or rolling just lying still. When I got to the barn/pasture she was up and standing in the shade with her head hung low. She had good gut sounds, gums nice and pink but had rapid breathing. There was no thermometer at the barn so I couldn't take her temp ( I am buying on tomorrow and making my own kit to keep with me, since there isn't one in the barn). She felt hot to me so I sprayed her down with cool water. Normally she fidgets a bit but she just stood there. After about 10 minutes or so she was back to fidgeting (like normal), and grazing. I led her back to the pasture where she went to grazing immediately. I left instructions with the barn owner to call me immediately if anything else happens or if she stays down too long. Does it sound like heat to you? ( It's around 96 here today with high humidity) Was there anything else I could have done, or should have done differently?