Hartz Ultra Guard Ear Mite Treatment for Dogs 3 Count. Help to relieve your pet s itchy ears with Hartz UltraGuard Ear Mite Treatment. It has three tube capsules that are designed for easy application directly to the affected area. The strong formula kills ear mites on contact for quick relief and also contains aloe to soothe irritation from scratching. This ear mite treatment for dogs is suitable for all breeds and sizes ages 12 weeks and older. Each of the tubes contains 100 drops and includes a cap for storage allowing for long-term and effective treatment.