I have a first calf heifer that is barely moving when she walks. I originally thought quick pneumonia, but after further inspection she has no symptoms other than gaunt and lethargic. The symptoms just started a day ago. She does not keep up with the herd, and has trouble getting up. I have her on pasture grass in KS with pond water and protein tubs that do have a low dose of urea in them. She gets cubes or hay every 3-5 days. She walks incredibly slow, but has a great appetite. The longer distance she walks the more agile she becomes. I'm stumped at her age and why this sudden onset. I am thinking possibly a slight urea poisoning? Our heifers are in great condition all the others are fat and will calve in March. Could it be and infection? I have eliminated many illnesses because of her good appetite. I gave a dose of LA300 and might give her Banamine for pain and possible fever. Stumped, please help?! Of course she is one of the nicer heifers in the herd! Any recommendations for medicating? Thank you!