So I've been working for three weeks on teaching "Sparky" to "shake". He just doesn't get it. His brother, mom and dad all learned within a day what to do. I have them "model" it, and I work with him separately. He is 15 months old and I'm beginning to wonder about his brain powers. He is just a big goober. He food so much that he is developing guarding issues over it. Not with humans at all, but the cats and sometimes the other dogs. All dogs are fed in separate bowls in separate parts of the house. I've been working on the shake with treats but that is all he can focus on is the treat in my hand. So I have tried it without and making sure he is looking directly at me, giving lots of praise. No go. He does know sit and come (because he knows there a treat at the end) and down. But we can't get past that. Do some dogs just never learn??? I worry that he can't learn one simple trick. ETA: He went for annual check up at the vet last week and he is healthy, good body shape but the vet thinks his food issues were because he was the runt of the litter. He is now a "beefy" 10 lbs heavier than both parents, but not at all fat.