Click to expand Tap to zoom Advocate Large Cat Purple Save $-66.99 $66.99 | / 6pk - Translation missing: en.products.status.sold_out 3pk - $66.99 6pk 3pk Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Advocate is an easy to use, monthly spot-on treatment that protects your cat from fleas, heartworm, intestinal worms and other nasty parasites.