Dog Friendly Cotswolds are the collective resource that is jumping up at your leg with all things dog friendly in the Cotswolds.
John Harris (Walks in and around the Cotswolds) has put together a huge array of local walks around the Cotswolds that can be viewed, printed and downloaded.
Joe Meredith from Cotswold Life has put together 10 great walks in the Cotswolds.
The National Trail have lots of walks detailing the Cotswold Way.
Winchcombe Welcomes Walkers website has lots of information on local walks.