answered question 5/4/2010 When Can I Start Feeding My 3 Week Old Pit Bull Puppy Soft Canned Dog Food? Depending on the size of the pup if 2lbs 2tbsp equal amounts of lbs to tbsp and thats soft puppy food from a can. Or I should have started with "This is what works for my pupps!", Sorry!!! Nicki from Sa, TX