Is their coop free of drafts? Is it nice and dry in there? Are they drinking enough water? Eating okay?
Their coop is draft free but does have ventilation, I think it has been lacking a little on the ventilation side as it has been pretty smelly in the coop lately. I use the deep litter method with pine shavings, it worked well last year, but the pine shavings don't seem to be the same this year even though it is the same brand. I have been turning their litter daily with a pitch fork and it seems to help and I also add more shavings as needed. As far as food and water, I haven't been home during the day due to work to see if the 3 are drinking enough or eating enough, I do know they eat the scratch I put outside of their coop in the morning. Today I was gone most of the day again, it was pretty cold today and most of the chickens didn't want to go in the snow I think they hung in the coop most of the day until the snow melted off mid afternoon. I did notice when I got home around 3:30 that most of the chickens were out free ranging but the 3 SLW were in the coop on a roost so that is not a good sign to me.