I know mosquito's kill the most humans every year than any other animal ,they kill about 2-3 million people each year.
Horses drink just water. You shouldn't feed your horse corn or oats they are bad for it. They eat:Grass ,hay,and some horse feeds.Look up baileyshorsefeeds on google. You can feed your horse apples or carrots for a treat but don't feed it too much because it can make you horse cheeky and nippy
Well some in thier stabe24/7exept when ridden but others are field kept 24/7 some are kept day in field and night in stable..