Hi, welcome to BYC!
First, remember that it is pretty normal for egg production to go down in the winter, with the shorter days more than temperature.
As for whether your coop is too drafty, you're probably in the best position to tell, yourself. Go in there on a windy day. Put a bare, possibly dampened, hand in the sorts of areas the chickens hang out. Do you feel a noticeable breeze? Then you should do something about it
If you don't feel a breeze it isn't too drafty
You should check this on different *sorts* of windy days (wind from different quarters) but basically that's what you need to do.
If the chickens are *cold*, as distinct from drafty, you might want to lower the ceiling or create a smaller 'coop within a coop' enclosure for the roost or something like that. As long as the air is dry and the breeds well-chosen, chickens can usually withsthand a considerable amount of cold, but at the same time there is probably no reason to make 'em colder than they have to be
It can't hurt to at least make a windbreak around the chicken door so that wind doesn't blow straight in.
Good luck, have fun,
Pat

First, remember that it is pretty normal for egg production to go down in the winter, with the shorter days more than temperature.
As for whether your coop is too drafty, you're probably in the best position to tell, yourself. Go in there on a windy day. Put a bare, possibly dampened, hand in the sorts of areas the chickens hang out. Do you feel a noticeable breeze? Then you should do something about it


If the chickens are *cold*, as distinct from drafty, you might want to lower the ceiling or create a smaller 'coop within a coop' enclosure for the roost or something like that. As long as the air is dry and the breeds well-chosen, chickens can usually withsthand a considerable amount of cold, but at the same time there is probably no reason to make 'em colder than they have to be

It can't hurt to at least make a windbreak around the chicken door so that wind doesn't blow straight in.
Good luck, have fun,
Pat