Cold front coming, will my babies be okay?

[Oncoming Storm]

So, I’m going out of town this weekend to finish clearing out my great grandmothers estate after her recent passing. And of course that’s when the cold front is coming. A relative of mine has volunteered to take care of my animals but here’s my question: it’s going to get down in the forties and I have a batch of three month olds and two month olds in the barn. Will they be okay or do I need to rig up my heat lamp before I leave?

 

[imnukensc]

They'll be absolutely fine.