Long stemmed grass hay or something like wheat straw. Long stemmed ROUGHage to scrape the insides of his rumen clean and get him to be able to rumenate. As far as tubing the calf goes, I assume that you have a chute or headgate to catch and secure him well. Don't want anyone hurt. I like to stand facing the same direction as the calf along the right side of his face. Take my left arm and grab the Left side of his mouth which will cause him to lift his head hopefully while opening his mouth. I have a piece of pipe that is slightly rounded on each end,( I'm sure that it came out of a plumbers shop). It is approx. 1 Ft. long and is big enough that I can pass a hose easily through it. The hose that I like to use is a5/8s in Nh3 hose. The outer hose wall is thick enough not to collapse and rigid enough to be able to push on down his throat. We put the pipe in his mouth from right side of the mouth angled towards the left side of his throat,(Left side =throat, ride side=windpipe) We use the pipe so that the calf cannot chew to hose and ruin it. The hose needs to be approx 6-7ft long. slowly ease the hose on down his throat being as gentle as you can , but also you have to have some pressure on it, but give the calf sometime so that he can swallow. Listen to the end of the hose that is out and you'll hear when it hits a pocket of gas. You may have to wiggle it or pull back and forth in the area when you are close. The right side of the calf doesn't really have anything to do with the bloat other than it will be distended B/C of the pressure from the left or high side. I would not recommend waiting around too much to see what happens. After you get him down I would also recommend putting 20 oz. of veg oil down him. If you can't get him down with the hose, put the veg oil down him. Chances are that if you can't get him to go down with the hose it is a frothy bloat and the oil will take him down. The reason that he is bloating is that his bugs in his rumen are outta wack and he may need help getting his rumen up and functioning. You should put some bugs back down him at sometime. Hope this lengthy babble helps you. Don't be scared of hurting or cutting something. You'll be fine. Good Luck, Brent