Day 95 of Dog - scheduling woes

It turned awful chilly. After a few nights where the heat didn't even come on, tonight it's getting down to 37. Perfectly normal and perfect for this time of year, but it makes it hard to keep dogs on a schedule. They're supposed to eat at six-thirty and then be outside from seven-ish until nine-thirty. The big dogs, I mean. The little one just goes out for a half-hour before bedtime.