Playing ball in the woods

The woods are starting to look very autumnal but it is still very warm this afternoon.
Pippin loves to chase his ball but the vet says it isn't good for his hips. He has suffered from hip and elbow dysplasia all his life but he needs exercise to help keep him slim so we have to get the balance right.
A half hour walk and a few throws of his ball is about right at the moment.