Each person has a unique circumstance based on the size of their dog, weight, what they eat, how they digest, how active they are and how the planets are aligned. Lots of variables. As a result, we recommend:
The Original PooVault is good for 60-70 pound dogs or smaller.
The Small Number Two Bag is good for all dogs up to 90 pounds.
The Large Number Two bag is good for any weight and multiple dogs.