Has anyone used the Dog Furminator or Cat Furminator? I'm looking for someone who has used it over winter time. I'm worried that with the amount of undercoat that seems to be removed, that my dog (and my cat, if I get it for him) will get cold. I live in Colorado, and it gets dang cold here.

I've just seen all these pictures of dogs with an unbelievably huge amount of hair that's been brushed off laying in front of them. Does this hurt?

Thanks in advance!