The products are not really designed for small or large dogs, instead it’s based on lifestyle and situation. Small dogs should receive 1 stick pack (dogs up to 50 lbs.) and large dogs should receive 2 (dogs over 50 lbs.). In some cases, small dogs are more sensitive emotionally or are more “nervous” than some of the larger dogs. In the case of nervous or stressed dogs, high potency is the recommended product-regardless of size.