Looking at the complete opposite I think a dogs ears feel hot if they're running a temperature (which Alfie has just now unfortunately)! 
Yes I find that too and if they have an ear infection.
All 3 of mine have been known to shiver...I must be tight fisted
Willow likes to be tucked into her bet at night...she sleeps on a duvet folded in half and has a blanket wrapped round her....the boys now have a fleecy blanket on top of their bedding to provide them with some more warmth but they snuggly with each other during the night.......the rest of the time when they are particularly cold, they find me quite comfy....I've had both of them on my chest all day in between chilly walks
