I think Jet might be having a mid life crisis. He's about 8 1/2 now and I've had him for 5 years. He's always been a placid dog, easy to train, lovely temprement. But the past week or so he's had a personality change! He used to stop jumping up when told, but now it's like he's on a pogo stick, he won't stop! He never used to bark except when some body knocked, now he's barking a lot. He'll bark at me if he's not getting what he wants.He's doing zoomies round the house and he want's more attention too. It's like he's a puppy!! I've not changed his food, the only new things he's had are fish4dogs things. He's not on Bakers, and he's not been nicking any blue smarties! He's healthy and nothing seems wrong. So, has anyone else experianced the same kind of thing with their dogs. Will it pass? Do dogs have a mid life crisis?