I need recommendations for a warm dog blanket. My dog loves to be warm, he curls up in front if the fire all day and when it isn't on, he snuggles up to me/my partner. I let him out of his crate this morning (he's still a puppy) for snuggles and noticed how cold he felt. He has a nice thick pillow type bed in his crate and x2 blankets. The crate is covered except for a little bit at the front he can see out of. Is there a certain material that is better for keeping dogs warm?