For practical reasons I have to (sometimes) use a bike trailer for my Jack russel. I bought a bike trailer but he couldnt be strapped in as it didnt have a harness so I have returned it. I have tried googling bike trailers for dogs and I'm surprised to say that I have seen videos where the dogs dont appear to be strapped in, I'm surprise because there are ones designed for dogs and they cost allot of money so I thought they wouldve come with a harness to strap the dog into. So do all dog bike trailers come without a harness or does anyone know of any that have them?