Poor baby. It sounds like he has a lot of problem already. I hope it isn't collapse trachea.
I assume it is pretty small 1/4 of a pill. I wouldn't chop it up unless you think it is too big to swallow.
To make it easier, give him little bit of cheese without the pill first to get him excited about the treat and then give him the treat will the pill. Most of the time they don't even taste it, they swallow it whole.