I would definitely just feed them what you have been as long as they don't seem overweight or anything. If you are worried about their weight, I would cut back on the treats first, then food. Also, our trainer told us that we should use treats that are easily breakable and only give a tiny piece. She said they don't need a whole lot to get the point... just enough for a taste.
So maybe, just cut the treats in pieces instead of giving a whole one, especially if you are using it for training and going to be giving a lot.