I'd like to get our QH to drink more water. He has a 23 Gallon Muck Bucket that we refill every day, and on a good day he drinks half. Sometimes he only drinks a few inches of water, I am not sure how many gallons that is but can't be more than a few. he gets soaked alfalfa cubes with a good bit of water morning and night so there's some extra water. And he has a large mineral block. I am not sure what else to do. I have tried different troughs and I have tried moving his water. Any suggestions?