How many sesame seeds can a dog safely eat, and when does the amount become a concern?

A small sprinkle of plain sesame seeds on your dog's food is perfectly safe. There's no strict toxic dose, but a good rule is to keep treats, including seeds, to less than 10% of their daily calories. Concerns arise if a dog manages to eat a very large quantity, like a whole container, which could pose a risk of intestinal blockage or pancreatitis due to the high fat content. For everyday safety, a teaspoon of seeds or a tiny dab of plain tahini is a reasonable limit for a medium-sized dog.