I use this veterinary practice for all of my larger animal needs.
they are great in dealing with alpaca's, cows, sheep, goats etc. Not just your average cat and dog vet although they do them as well.

Approximate cost: $20 (medication)

We have always used the Banno Vet for all our animals, and they're fantastic. Very compassionate when having to suddenly put an animal down, and they offer home visits for livestock too. I think so far they've seen four of my sheep, two dogs, a cat and a calf, and there hasn't been a problem they couldn't fix for our critters. They're usually running a teensy bit late, which I don't mind. Pricing is somewhat expensive, but I think that is the case everywhere you go.