This is going to make me sound like a worry wart.... but it DOES worry me! Our dogs sleep with us in a king size bed. Tiara insists on sleeping completely under the blankets, all the way down by our feet. I am worried she will suffocate, won't the carbon dioxide hurt her? My husband assures me its safe, but I want to hear it from a dog person, preferrably someone who works with a vet can ask them.... I could ask my vet, but am embarrassed to, because maybe i AM being silly?!?!??!