Worst thing that can happen is if it's too much for puppy the stool might get a little loose. Just cut back if that happens. They really like the taste of it. So just throw the gel cap into their food dish, and it will disappear. When my 1/2 Lab had Lymphoma the last year of her life I gave her 4000 mg of fish oil 2X daily without any problems. Of course her weight (80lbs) was a little more than your puppy's.