My horse usually is outside 24/7 and loves being out in the rain. Lately, Ive been wanting to keep him in when its rainy to keep his coat nice and so he doesnt get "sick." How bad is it for them to be out in the rain? Do you usually put your horses in or let them stay out in rain? He has access to his stall but chooses to be out and get wet. Its getting cooler at night and Im afraid hes cold and wet out there. Its best to just put him in right?