Hi!

There are a lot of pet frendly hotels at Hertfordshire. Just take a look in this site.

Hotels in Hertfordshire where pets are welcome! Stay with your pet in Hertfordshire - Pets Lovers Hotels

I've been in the Bobsleigh Hotel in Boxmoor and it's highly recomended because is a wonderful place, with lovely gardens where you and your dogs can have a wonderful time.

Bobsleigh Hotel: pet friendly hotel in Boxmoor - Pets Lovers Hotels

Hope you'll enjoy it!