This is a 6 pack of RSPCA Monthly Heartworm Tablets for large dogs 45-88 lbs (21-40 kg). This 6 month supply of heartworm tablets for large dogs comes in a orange pack. Each tablet will treat your dog for 1 month. These tablets prevent heartworm disease in dogs 45-88 lbs (21-40 kg). It prevents heartworm disease in dogs by elimination the tissue stage of heartworm larvae that infected the dog in the 30 days before treatment. It can be used on puppies from 6 weeks of age.
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