Can I Suffocate a Dog?

We're trying to empower pet oners to really provide health for their dog. So we can't suffocate a dog, and can't eliminate oxygen so it has to be breathable. But at the same time, the best way to a dog in terms of health is to filter out the smallest particles that can get into the lungs. And if it gets imbedded into the deeper parts of the lungs, it gets into the blood stream and a be circulated throughout the entire body. We had to make a decision around how much a filtration do we want to use in this product,. The strength of the pilter became a point of concern.