every week or every other week
There are many types of feeders for just about every type of horse set-up, from mangers or feed troughs, to hay feeders or buckets. They can be expensive and elaborate or it can be as simple and cheap as a Fortaflex bucket. Most horses don't care just as long as you put their food in it.
not very often as it may rip or shrink
DailyDaily
A lab coat should be washed after every use to maintain cleanliness and hygiene in a laboratory setting.
if you want to be safe, every day or so
At least twice a year or when ever it is needed
Every hour
Daily you should always clean your horses stall at least once a day
A horses stall should be cleaned every day if possible but if not every other day.
You should change them after every feeding because they should be washed after every feeding.
Every hour, or as required
a stall?? Once daily...