posted 8 years ago
Worm resistance is a very overrated quality, expressed more in the amount of grazing acres they have then in their breed type. It is easy to understand. A worm in a sheep has a 21 day life cycle so if you can break up that cycle by rotating the sheep to fresh pastures, and they do not have to regraze that same area within 21 days, the chances of parasites are far less. I am not sure what is considered a parasite resistant breed now; every breed directory claims it, but I am certain my sheep do not meet that requirement, yet I have very little worms in my sheep. Why? They graze 2 acres per sheep when here I can stock it it a density of 10 sheep to the acre. In short, they have plenty of land and are not so hungry they must eat that tuft of grass above their pelleted poo less than 21 days old. And you can check their parasite load count by checking under their eyelids too by the way. The more yellowish it is, the more worms they have.
As for rotational grazing and grass fed only, sheep are pretty resilient and can stand the change. I would just stay away from Hampshire and Suffolk as they do indeed like their grain. I have these two breeds so it is not said without experience or to spite them. They have their place, and convert lamb fast, but it takes a poke of grain to do it. Finishing other breeds of sheep on grass is still a challenge, doable, but a challenge. It requires being on your game as far as rotating between fields, getting the right combination in your fields, etc; but it can be done and just about any breed (other than Suffolk or Hampshire) can adjust well to it.
As for price; I will not buy any sheep for more than $200 bucks. In your case I would buy older ewes, they do not really hit their stride until 3-6 years of age anyway and buying market lambs is a gamble. What you are looking for is not all that hard to get and I buy and sell sheep all the time.