For our son's birthday last year we got him a Border Collie named Jax. We got him from a rescue place and he was apparently about 2 years old - seems he could be younger as he is so bouncy, and chews things and the vet said he may be only 18 months. We had to get a dog trainer out to see him cos he was too boisterous - and what was the first thing she told us? - to change his diet!! Which of course we did straight away and in 3 days we had a much calmer dog. The next week the trainer asked if we had changed - of course we had bought the new food that same night - she was surprised we had done it as many people don't bother changing the diet. Up at the dog park a lady gave Jax a piece of Smacko and of course he went Whacko. We just love the fact we got a dog who is food affected too!! - Anne from Brisbane