We have a 10 year old ewe that has decided she doesn't need to go out to pasture with the other ewes anymore. This caused her to get fairly thin. Finally, I put her in the barn alleys and she eats grass from our back yard and I give her grain every day. If I put her with the other ewes, I'm sure she'd not eat enough pasture and her temperature would drop like you see in your ewe. In a few days I will separate the rams back from the ewes and put all my ewe lambs in a pen where they get better feed then the older ewes. Our pastures are just about done too so I'll put the old lady with the ewe lambs for the winter. Lucky for this ewe she's the mother of multiple stud rams we've used and several of our best ewes so I tolerate her self promotion to royal status.