I have a 3 mo.beef steer, still nursing eating grain, grass, hay doing great,full of energy chewing cud. This a.m. he has the green scours,seems like when our calves are 2-3 mo. old they get this. We have a very sanitary environment,cows have plenty to eat everyone is healthy, but this drives me crazy. Possibly the calf has over eaten, his temp is good. The weather has been very hot and humid, this plays a part I know. Anyway I always start w/ pepto bismol, he has had 2 doses today. I have spectam scour halt, but am leary of trying it, calf weighs about450lbs.How much of the spectam do I give, or is this calf too old to use it? Any help is appreciated-Thanks