They're so lucky to have a caring human looking out for them!

I have a medium igloo style dog house that i put on my front porch just in case the kitties that I have been feeding want somewhere to get out of the elements. i have cleaned out the old straw and need to refill it.

It looks like you have a few inches of it in the picture above.

To make it at least six inches deep-ish. But if you put more on top of a 6" bed, they will sort of make a nest and that will help keep them warm.

My 2 cents.

I just keep adding on top. In the Spring I'll replace it with totally fresh straw.

Kind of similar to birds' nests.