I see that you were on the forum back in April trying to get your tortoises warm enough to be active. You got lots of great advice and help to get your tortoises warm. From a post in another thread you just did, it sounds like you didn't get any of the bulbs, ceramic heat emitters, heaters, or anything else recommened to warm your tortoises.
Your temperatures are to low for your Horsfields to want to be active and eat, but to warm to bruminate (hibernate) properly. We'd need to know how big your tortoise is (straight line top shell measurement) and weight to know if your tortoise is heavy enough to hibernate.
If you don't want to bruminate (hibernate) than you'll have to follow the advice already give you here.
http://www.shelledwarriors.co.uk/for...ad.php?t=49520
What happened to your sick Horsfields?
Danny