Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to prevent hookworms in dogs [title] Provide your dog with preventative medicine. [step] Deworming your dog frequently will help to control hookworm infections. Most heartworm medication includes medication that is effective at killing hookworm infections.

Ending1: If you are taking other medications, such as antibiotics, your dog may be prescribed deworming medications that contain deworming agents. Ask your vet which over the counter drugs or medications are safe for your dog to take. Ending2: This could be a shot, stronger medicine, or a combination of both. Make sure to use your veterinarian's label for correctly-administered medicine. Ending3: Oral or podophyl deworming medication will increase the number of times hookworm infection kicks in. The dose should be around 4-6 mg per 1 pound of body weight and a 20 lb dog should have meals three times per day. Ending4: Treating your dog once a month with a deworming medication will keep these pests in check. [substeps] Mother dogs and puppies should also be dewormed frequently.

Answer format: ending1/ending2/ending3/ending4