Sale Add Wish List Quick view Choose Options CrossBlock CrossBlock II for Cats and Kittens Over 9 Pounds - Orange Label (3 Month) CrossBlock II for Cats is a topical flea treatment for cats that kills adult fleas as well as their eggs and larvae. It contains imidacloprid and pyriproxyfen, and start killing fleas within 2 hours... MSRP: Was: $20.99 Now: $15.99 Choose Options Compare
Sale Add Wish List Quick view Choose Options CrossBlock CrossBlock II for Dogs and Puppies 11 to 20 Pounds - Green Label (3 Month) CrossBlock II is a topical flea treatment for dogs that kills adult fleas as well as their eggs and larvae. It contains imidacloprid and pyriproxyfen, and start killing fleas within 2 hours and... MSRP: Was: $22.99 Now: $16.99 Choose Options Compare
Sale Add Wish List Quick view Choose Options CrossBlock CrossBlock II for Dogs and Puppies 21 to 55 Pounds - Red Label (3 Month) CrossBlock II is a topical flea treatment for dogs that kills adult fleas as well as their eggs and larvae. It contains imidacloprid and pyriproxyfen, and start killing fleas within 2 hours and... MSRP: Was: $22.99 Now: $16.99 Choose Options Compare
Sale Add Wish List Quick view Choose Options CrossBlock CrossBlock II for Dogs and Puppies 3 to 10 Pounds - Purple Label (3 Month) CrossBlock II is a topical flea treatment for dogs that kills adult fleas as well as their eggs and larvae. It contains imidacloprid and pyriproxyfen, and start killing fleas within 2 hours and... MSRP: Was: $20.99 Now: $15.99 Choose Options Compare