I think in the Winter.
winter
A Large size
If your horse shivers from the cold in the winter, you need a blanket. some horses get cold easy other don't. If you live where you don't get snow I would just let your horses grow there extra hair the natural way, but if you live where it snows you should put the blanket on.
Horses should wear blankets in the winter. If they are allowed to grow their winter coats, something light should suffice. However, if they are being used in lessons or showing and get body clipped, it is essential they get a heavy winter blanket. They may also need a light blanket in early spring or late fall, depending on how cold the weather is. Indoors, if the windows are closed or only cracked, they may be fine without a blanket. However, when outside in the winter months, they should always have a blanket on.
u should only put a blanket on during winter. later fall and early spring u can have a light blanket on. horses do grow there own winter coat that is (don't quote me on this but) 10x warmer than a blanket and you should let them grow that for a little before u put a blanket on them. also younger horses do not need a blanket they should grow there coats out.
The word rug usually means turnout rug which is a waterproof, durable blanket for the horse to wear outside in bad weather. Depending on what region you live in fall through early spring is rug season.
If the rider is riding the horse they wear a bridle and a saddle and if they are outside they wear a flymask and / or a fly sheet or nothing and if they're in the stall they will wear nothing or a horse blanket.
Yes, a horse can wear a blanket year round. For cold temperatures, there are blankets of different weights for different temperatures. In the summer, horses can wear an anti-sweat sheet or a fly sheet to keep them clean.
if you have trained a horse and it is sweaty you would put a cooler on it, a thin fleece blanket
This depends on if the horse has a full winter coat or not, if it does, then it should be fine, so long as it's not old, a foal, pregnant, or sick. If however it is old, sick, young, etc then a stable blanket would be called for, along with some extra hay to help the horse keep itself warm.
It is bad for horses to wear blankets as you can read in the related link. The only time you would need to blanket a horse is if you rob them of their protection from the cold by clipping them. In this case the blanket is the lesser of 2 evils, even though it is still really bad. To tell if the horse needs a blanket, touch his ears. If they are cold, he is most likely cold. If not, he probably isn't, so leave him unblanketed.
I'm pretty sure Winter.......the season is cold and the horse probably needs the extra warmth not completely sure If you clip your horse, then the winter. However, it is better to leave your horse unclipped and unblanketed. They are better off with only their coat to keep them warm. They have very good ways of heating themselves, and blankets aren't one of them. Blankets don't cover all of the horses body, they cause the muscles horses use to dialate blood vessels to cool off and the muscles they use to lift hairs to make a thermal blanket to keep warm to atrophy. And if a horse has a blanket and they are too hot, they are left to sweat under the blankets. Also, horses thrive in the cold. When it gets cold, surely you have noticed how frisky they get. They love it! just try no blankets. Come back 10-15 minutes later and feel the horses ears. If his ears are cold, he is cold, so he may need a blanket.