The only foolproof way is an ultrasound.
Generally, if you have seen a ram mating the ewes, you can count on lambs 5 months later. Our ewes plump up and their bellies become larger. Their appetite increases significantly, especially in the last 2 months. In the last month, their milk will...
we feed alfalfa to pregnant ewes and lambs as a supplement. otherwise, they graze and have access to bermuda hay. nutritionally, adult sheep don't really need to eat alfalfa - bermuda or timothy is preferable.
we supplement our ewe's grass/hay with 4-way feed or sweet feed, which most feed...
check out nebraskasheep.com. there is a breeder's directory listed by state and breed. we are listed there and receive alot of calls from locals looking for sheep.
good luck,
lynn