Jill, just in case you don't know much about sheep............people that have them have said "you have a sick sheep, you have a dead sheep". LOL Sorry not to be a little more encouraging, but I guess they're pretty persnickety health-wise.
Good luck. The lambs are so cute, tho, when they cavort around as only lambs can.
I have to work at the local sale barn when they have their monthly sheep and goat auction. Never any lambs, but sometimes we have goat kids. They are so little, sometimes only 5 pounds each. They don't bring much, that's for sure. We can hear them bleat in the office sometimes and they sound like babies crying.
