V the V's response brings back this thought that I know I have expressed before, but here goes. A "GOOD" large animal vet is almost a partner in your herd, if you have 1 cow or a thousand, the vet is the key. If you don't think your vet is doing enough, find another vet. You must be comfortable with her/his skills, methods, the way he/she handles to animals, and most importantly her/his/its concern for the wellfare of your animals. Take the time to establish a relations with the vet. A "GOOD" vet is not an expense it is an investment in your future success. I'll climb down from the soap box now, and I am available for anybody to take pot shots at.