Folks, first thing that needs to be said is..I am not trying to be a know it all, but a calf that young and small doesn't need hay... it's actually detrimental to it....I suspect the idea here is to try and convert the stomach into a mature ruminant.......not going to happen at this age..........no matter what..... you are looking at 4-6 months for that to even happen.........
Best thing to feed is a GOOD milk replacer, and also a good very high quality, high protein calf feed.... what hay does is simply make pot bellies, and really does not get digested properly at that young of age.......
Recent studies also indicate that Nuflor is not the best therapy for young stock such as that,, they have a really hard time metabalizing it...I didn't just make this up....Dr. Jeffers, and several other very recent studies have found this....not to say that I haven't successfully used it myself... but thats what is being told these days......
As said drexxin is the latest and greatest...but is it worth the $450 bucks give or take per 100 ml bottle?
SMZ is still a great drug, as it gets into parts of the animals anatomy that other drugs won't..and still relatively cheap.
Batryl is a great drug, and much more affordable... but still expensive......
Might I also suggest Daique as an excellent gelling scours treatment? after raising literally hundreds of bottle calves, I have found this product to be far and above better then most.
I would offer the cost versus returns speech to you, but seeing you have named them and all,.............................
I am of the mind that as tough as it may be......I allow just so much money and time to be spent nursing a calf...especially milk breeds.......if no improvement is seen , I either let them go or put them down.......sad fact is, you will never get a return on a milk breed calf or steer to cover the costs of extended and expensive therapy. sad but true. Good luck!