I have a 4 year old Quarter Horse named Chess. I just recently (about 3 weeks ago) moved him from where I got him from to a new pasture. Everything was going great until a week ago (sunday) I went out to feed him and noticed a very bad limp. The farrier had been there a week before and said that nothing was wrong. I later found out that he cut his heel sometime during the night. We never found out what he cut it on. I called the farrier and he said to just keep it clean and use Corona Ointment. He is much better on his foot now but he is acting weird. He eats good and everything but he has been laying down and farting alot. His poop has also been a little soft/runny for the past few days. I searched it on google and it said something about gas colic. Can someone tell me more about this? I feed him 2 scoops of ManaPro Sweet 10 morning and night due to him being a little under weight. I also feed T&A twice a day. He was only getting it at night because he was out to graze during the day but, due to the injury he has been kept in more. When he hurt his foot we gave him some banamine for 3 days to ease the pain and I just wormed him 2 days ago. Could the way he is acting be caused by this? I have been around horses for 13 years but I havent seen this before.