Cold hosing in winter isnt going to hurt them I always cold hosed my race horses in the winter. But if you feel that a liniment is better choice then I would say try mixture of bigeoil with 70% alcohol. I found this mixture to work awsome when I used it on the jumpers as well as the race horses.and my vet said the mixture is wonderful for the onset of arthritis.
I recently invested in some ColdFlex wraps and LOVE them! I throw them on JJ right after we get done running I keep them on while I untack and brush him down then may go for a short little walk around the place. They work great and really cool the leg down nice.