We pay $16/dog to be boarded at the vet. This is a 8 lb miniature schanuzer and a 18 lb miniature schnauzer. We also pay an extra $2/day to have the bigger one get her thyroid supplement. And this is for sharing a cage since they cannot stand to be separated. My vet doesn't charge based on weight which is bad for me, good for my mom with a Rottweiler. Mostly they stay with my parents, on a long trip we usually give them some money to have a night out.