Help... I'm accustomed to bonsai and citrus lol. This is the first year I will have orchids during autumn and winter (and lots of them!!) Most of them are phals, but I have three, pics below. What do I need to do with these during winter? Do they need rest, cold, no water, no food? I'm a bit confused lol

Oops...pics

why won't my pics load? lol I tried twice. Anyway, the pics were of a dendrobium, one called tahoma glacier or something like that I think, sorry can't remember exact name, and an encyclia cochleata.