Yes cold winters here. Subzero temps at times. Some folks do warm oatmeal occasionally. I give some "floating fish food " to up their protein level as it is 38% protein. Folks also add blk. oil sunflower seeds too. All of that is a treat only though.
I don't worry about them in winter as much...
I agree I do it fresh every day and they love it. By a.m. they have finished it. I also would not do too much at a time cause it's gets nasty in summer, plus they live the coolness of it. At least I know they are getting a balanced meal each day. ( plus you're the queen that brings goodies!)...