Kansas City’s largest pet friendly 3K walk and certified 5K run in Brookside. This event is fun for the whole family – with activities for adults, kids, and dogs! Wayside Waifs: Wayside Waifs is committed to finding homes for all adoptable pets. Wayside is the largest pet adoption campus in Kansas City, in 2019 Wayside adopted more than 5,800 animals in loving forever homes. Wayside does not euthanize adoptable animals, and there are no time limits for animals in our care.