Usage: Heartworm prevention.

Small - Blue - Up to 22 lb
Medium - Green - 23 to 46 lb
Large - Red - 47 to 99 lb
Extra Large - Yellow - 100 to 150 lb

Each size is available in a 6-pack only. Use one treatment per month for effective and easy prevention of heartworm.

Cheaper than most other monthly heartworm tablets.

Note: If your dog is over 6 months of age and not already receiving some form of heartworm preventative it is essential that the dog be tested and found to be free of heartworm before using this product.