Well..
I keep my house pretty cool during the day also- But at night...its just as cool because for some reason...I get hot~ lol Couldn't possibly be my age could it? LOL
Anyway...I've been placing a sweatshirt or sweater on my puppy for the night and by the time I'm up in the morning...she is out of it- I keep blankets in her bed and fuzzy toys to snuggle to.
But your right..they can get chilled.