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100 x Roo bone flavoured chews contains-272ug Ivermectin

For prevention of heartworm. Expiry March 2011

For dogs weighing 22-44kg (48.5- 96.8lbs) give 1 chewable each month.

Will kill heartworm larvae which are acquired from infected mosquitoes within the previous 30 days. May be given to dogs of any age, pregnant females and stud dogs. Dogs will Love them. A great alternative to Heartgard Chewables as the active ingredients are identical