I rarely let the horse and pony graze in the front yard but decided to let them today. I had set a 40lb. bag of BOSS in front of the house and didn't even think of the horses being interested in it. Came out to put some laundry in & sure enough my horse pulled the bag off the bench, had it all dumped out and was chewing a big mouth full. I put the horses away and scooped up what I could off the ground. It's hard to tell how much he ate but I'd say around 5-10 lbs. Is this something that could cause him to colic??