[Atlantia]

Thanks for your replies,

Some years ago, when Toby was about ten, the vet said that Toby had a heart murmer, but it would be some time before it caused him any trouble.
Toby is a nervous dog, and gets very scared of the vets, but hopefully I can manage to calm him down before taking him. He has herbal tranquilisers which he has whenever he goes to the groomers. He had to stay a few days at the vets once, and has been scared of them ever since.
I'm also going to try glucosamine tablets for him, suggested by Val.