Need a sitter experienced with reactive dogs. How can I search for this?

My dogs require an experienced and highly attentive sitter who has experience handling large breeds with dog reactivity. I've found a few diamonds in the rough, but most sitters seem to be mainly accustomed to normal, well-socialized dogs. Is there any way to search profiles and reviews for specific terms like "behavior issues" or "reactivity" so that I can at least narrow down my search? It would be even better if http://Rover.com could offer this type of experience as a selectable option under "additional services"!