yes blankets help if they are fitted right. can be hazards if not.
but i think your bigger problem is nutrition. poor quality hay doesn't cut it for winter time. she is not getting basic nutrition needs met, and the cold is using up what she does get. it's good that you are adding alfalfa pellets, but she needs more. feeding the pellets AND a complete senior feed will help a lot. she will need lots of it. it's complete, meaning it includes fine chopped hay, so the volume you feed is greater. probably similar to what Appyt said above. you can feed 12# a day, but work up to it. don't feed a lot at first.
also if the others are not wormed, you need to be worming her every single month and rotate types of wormer. otherwise you are only feeding the worms, and they aren't worth the price of feed!!
just some thoughts that might help you. and how good a shelter does she have from wind and wet? that makes a huge difference in how much body reserves they burn up to stay warm.
but i think your bigger problem is nutrition. poor quality hay doesn't cut it for winter time. she is not getting basic nutrition needs met, and the cold is using up what she does get. it's good that you are adding alfalfa pellets, but she needs more. feeding the pellets AND a complete senior feed will help a lot. she will need lots of it. it's complete, meaning it includes fine chopped hay, so the volume you feed is greater. probably similar to what Appyt said above. you can feed 12# a day, but work up to it. don't feed a lot at first.
also if the others are not wormed, you need to be worming her every single month and rotate types of wormer. otherwise you are only feeding the worms, and they aren't worth the price of feed!!
just some thoughts that might help you. and how good a shelter does she have from wind and wet? that makes a huge difference in how much body reserves they burn up to stay warm.