Steve,
Think niche within a niche and Focus towards all kinds of other Pet related businesses who already have a clientele that would Love your finished product.
Small specialty businesses need an Education in adding other niche products and services into their business models, therefore giving them Multiple streams of income!
As you know your product Does that.... So Educate them.
This can be Applied to so many Businesses...
Also... Do you have an Affiliate program? If you don't... Why not?
Phil