If you've been giving your dog "people" food and want to get it
back on dog food, then the best way would be to gradually begin
mixing dog food with it, increasing the amount of dog food every
few days.
But in order for this to be successful, do NOT give your dog
table scraps while making the transition from human food to dog
food, nor should you give him any after the transition. At first,
your dog may turn its nose up at the dog food and refuse to eat it.
If it does, don't worry. A dog's survival instinct is far too
strong to allow itself to starve. When it gets hungry, it will eat
the dog food.
Just be prepared for the "guilt" you will feel, and don't let it
make you give in and go back to giving your dog people food. After
all, you are doing what is best for your dog, and this