Well first off, Good Luck on your new calf....and yup... holstein alright.....keep in mind that dairies mosty beef growers consider these bulls of little value and are simply 'byproducts' of breeding and milking dairy cattle.
But, that being said, having raised many a bottle calf, I see nothing wrong with working with this one, even if he is a 'shed' animal.
First off, i know I am behind the times here, chiming in after the fact, but here goes.......... a very simple thing to check and the first thing you should do , is check for temps..........this is the most telling and simplest diagnostic test you can perform.......a fever or a subnormal temp tells you something is wrong...........a fever tells you that there is usually an infection of some sort going on, a subnormal temp tells you likely that there is either a metabalism issue, OR the calf is into a septic situation and is loosing ground, (although by that time they are down and moribound by that time, which is rather obvious by then)
Ok if it has a fever.............most calf bacterial ills are best and inexpensivelly treated with the various sulfa drugs...SMZ, Sustain etc.......... Nuflor, Batril are great newer generation drugs, but are rather pricey............the cyclines are about worthless when it comes to scours TREATMENT as well as joint ill. Sulfa drugs such as SMZ penetrate through certain membrains etc that other drugs cannot, the bones, the brain etc being some of them. Sulfa drugs do come with certain downsides, that are not too awlfull but too lenghtly to discuss here.
Of course illness from virus is best treated with supportive therapy and treatments to try and prevent 'piggyback' bacterias from invading the weakened system.
The most important thing to keep in mind when dealing with illness in calves especially is that they are so easily to die from toxemias and septocemias and require supportive therapy.
And when it comes to probious, it is a great supportive therapy as well. but save it for AFTER the finally oral treatment, so it can produce those good bateria in the gut as it should.
At some point we are faced with the facts that financially it may not be worth certain treaments and must allow things to either progress, treat more conservatively, or end treatment and the suffering of the inflicted animal.....or we can , as I am at time more controlled by our emotions and continue aggressive, expensive, and often futile treatments..........it's a personal choice that no one has a right to second guess.
Heck, if that were the case..........I would not have gotten so many 'Thank-you' and holiday cards from the children of my Vet, for whom I am helping put through school. :lol:
I admit to 'buying' one cow in particuliar many times over for all of the vet bills spent on her. Even if she has her portrait prominantly displayed in an art gallery. Good Luck! :cboy: