As a bit of background, my parents have a 14-year-old labrador who was trained as a Guide Dog but rejected. He's been a pet now for about 12 years and always been impeccably well-behaved during this time.
He is starting to show lots of signs of old age - deafness, accidents, slowing down etc. But he's become as bad a puppy when it comes to leaving him in a room of things which shouldn't be eaten! In the last few days he has eaten a huge bowl of pot pourri, a box, the contents of the bin and a box of chocolates (which were on a shelf - have no idea how a young, fit dog would get those down so stumped as to how he managed it!)
Is this normal? Does it indicate some kind of deficiency? Is is doggy senile dementia or something? It seems utterly odd.