Are three-wheel or four-wheel pet strollers better?

Three-wheel jogger-style strollers track straighter on grass, gravel and uneven sidewalks, which is why all-terrain pet strollers favor them. Four-wheel strollers are more stable when a pet shifts weight inside, which r/dogs commenters specifically flag for cats and fidgety small dogs. Choose three wheels for jogging and rough terrain, four wheels for around-town stability.