Making a Dog wheel-chairs?

Question

Me and my friend are entering a new design for a dog wheelchair. And we need to know if there's any certain types of wheels we have to purchase first. Or if there's any kind of material needed.

Also, what kind of metal?

Where could we get these materials, and how. <333333333

We're making A NEW design for one.

One where it can actually sit. And..well we're still in the designing stage. But I'm confident we'll get somewhere.

Answer 1

To late and a dollar short, there on the market already,