I see dogs riding in a front mounted basket - rear basket - trailer - next to the rider (on recumbent) - and perched on the riders shoulders

a couple of times I’ve seen a bike rider with dog on his shoulders and another dog in a basket … went by so quickly in the opposite direction could have been two dogs in the basket … ? … can’t recall

the riders that have the dogs on their shoulders are wearing a backpack or similar which apparently provides a spot for the dog to place hind legs / rear

one of my favs is a senior bike rider that pulls his dog in a trailer … during holiday weekends etc the dog is often in appropriate wear - including stars and stripes, pilots mask with goggles, etc