Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep your senior dog safe around young kids [title] Take your dog to the vet regularly. [step] Some older dogs can be easily frightened by loud noises. This is because their hearing has become weaker with age.

Ending1: Having your dog's hearing monitored is an important way to keep your dog safe. [substeps] You can take your dog to the vet whenever you notice that loud noises may be coming from your kid's room. Ending2: When playing around older dogs, encourage kids to keep the noise level low and steady. [substeps] You might say, " let's use our inside voices around rex, because loud noises make him nervous. Ending3: Take them to the vet to have their ears checked. [title] Manage your future in-laws' furniture. Ending4: [substeps] If you can keep your dog relaxed around young children, you can try playing fetch with them. [title] Take them to a dog park or animal shelter.

Answer format: ending1/ending2/ending3/ending4