Please choose the correct ending to complete the given sentence: Health: [header] How to handle an allergy to your new dog [title] Make certain areas of your home dog free. [step] To help alleviate your allergy, create an area of your home that is dog free. Designate your bedroom or the upstairs area of your home " dog free " and keep the dog out of these areas.

Ending1: Keep the doors closed or block off the area with a pet fence. This way, your dog will stay out of certain spots in your home. Ending2: You could also opt for zones that are dog safe (such as in garages or fenced yards). [substeps] For instance, you could have a fenced in backyard instead of a dog-proof yard. Ending3: [substeps] Dogs in homes with heavy doors and carpets can still escape through small spaces. Keep your dog away from areas that need a lot of work or attention, like bedrooms. Ending4: [substeps] Continue to make sure these areas are accessible by other pets and when you get home from work. Discourage dogs from entering rooms with exposed entryways or doors that lead outside.

Answer format: ending1/ending2/ending3/ending4