CrossBlock II for dogs treats and prevents flea infestation on dogs and puppies 8 weeks of age and older.
Active ingredients include: Imidacloprid 9.10% and Pyriproxyfen 0.46%. The same ingredients in Advantage II.
• Kills adult fleas and prevents further re-infestation on dogs
• Kills re-infestation fleas within 2 hours
• Breaks the flea life cycle and prevents flea eggs and larvae from developing into adult fleas
• Waterproof after application
• Effective for one month. 3-Pack provides 3 months of treatment.