ATOZ, you are IMO, doing the wrong thing by going to a hotter ration. In fact you may have to take him off of all grain concentrates. The corn may be the # 1 cause for the bloat. We all want to push too hard, too fast. I would say that you may want to try to get a bloat guard type of block and give your steer access to it and no other blocks like salt or mineral blocks for awhile. If you are feeding this calf separately by chance, I would do the mineral oil, corn oil, or which ever oil you deem the best for you. The probios treatment will not be an instant fix. I would give him probios every 3rd day for 3 to 4 times. You are trying to get his rumen bugs adjusted by using these products. Another thing that you can do is to go to a slaughter facility and get some rumen contents. You then will have to to strain this through a towel or strainer with warm water as to not shock or kill the microbes. Once this is done you then need to drench the steer with the fluids. Natural form of probios. Long stem hay or even straw may be best to restart the rumen. Good Luck. Our heifer is still breathing and hasn't been up since last Friday. We have her on a bloat guard, but are watching her as if she were about to calf. LOL.