
Try a bone, it may be bigger than him depending on breed but it will keep him occupied.
Dont buy the cooked ones from the pet shop, too salty
Go to the butchers and ask for a part beef bone (raw) or a knuckle, try to avoid skinny rib bones if you have a big breed dog. They will usually have some from the meat they have de-boned that day. Our butcher gives them to us for free as we buy a lot of meat from him but they may charge you a couple of quid but not much.
They really love a raw bone at any age.
Emma