Cold hosing below the knee and hocks is okay in any weather. We did our racehorses all year long. If the illness was an eye infection, I really don’t get the leg wrapping, unless you are doing some seriously hard work. Wrapping, if not done very, very carefully, can cause swelling and all sorts of other undesirable things. Except for an injury we never wrapped our TB’s, and they only wore rundowns during races. None of them ever had leg problems.
If it is really, really cold and wet as well, I’d do the hosing in the wash stall and perhaps even wipe off any excess water when done, but my little orchids live outside and neither cold nor wet ever seems to bother them.
It is never the horse's fault