I posted about a week ago that I have a cow having the scours after deworming. That happened last Tuesday. I put out some hay as recommended by one of you. Last Friday I started noticing that 4 or 5 of the cows looked like they had lost a good bit of weight in the last few days, and a couple more were scouring. By yesterday every cow in the pasture (20) was scouring, and most looked to have dropped 100 lbs or so in the last week. The scours are really bad too, worst I've ever seen, but the weight loss seems to have happened just prior to the scouring, which really doesn't make sense. We called the vet first thing this morning to come take a look. By the time we got the cows pinned it was pretty obvious that they had a thin clear to white nasal discharge also. The vet got blood samples off the first four cows we ran through. They all had a temp of 102.5-104.4. He gave those all 4 Sulfa boluses, and a shot of antibiotics. He wanted us to give the rest of the cows boluses and a shot of CTC. Nobody in the county, including the vet, had enough Sulfa boluses to give them all, so we gave them the antibiotics and will have the boluses on Thursday. He didn't really speculate as to what the cows might have. I have never seen anything move through a cow herd like this, we very rarely even have one sick cow. We haven't brought any new animals on the place since last January. The farm where these cows are located is on the main road to the salebarn for most of the farmers, so I am wondering if it may have been picked up that way. Do any of you have any idea what they might have? We are leaving them in an acre pen where they will have very little access to grass. We are feeding hay, and also started them on Soy Hull pellets today, along with a Crystalyx barrel. Any help appreciated.