As another horse person that crossed over to cattle years ago here's a few things I have learned. Observe your cattle you can pick up on a ton of things and stop a lot in its tracks. It has seemed like thru the years we have had the least amount of problems with our show cattle and the most with baby calves. Find a neighbor or friend with cattle experience and also use their knowledge. I learned a ton from our farmer neighbor when just starting. Use your vet as a reference. Calls are free. There are tons of helpful people on here even tho it doesn't seem like it at times. There will be a learning curve. It sounds like you have a good start. The big thing is to read labels and use common sense. With just a few head I wouldn't keep much on hand for drugs as it would pry expire before you would use it. LA 200 and pen have their place but I will agree with the rest that there are better respiratory drugs out there. Also the search function on here is great.
