Have you thought about switching there food? So much of the cat food is bulked up with corn or wheat. We spent hours ( really) looking for the best for our children...... What we found was Purina Pro Plan True Nature Natural Trout & Rice Recipe. Trout is the #1 ingredient and it has 45% protein. This is one of the highest protein cat foods out there, and we can see the results in there energy and in there coat's. They are very sensative to change if you try this do it gradually. :)