Dog trailer for motorcycle?

Don't hit delete yet.. I'm asking for a friend that is going to help me weld my tear up in a few weeks. He wants to build a small trailer to tow behind a motorcycle that will haul his two dogs. We figure the basics of teardrop construction would provide some guidelines.
Anybody here ever attempt anything like this? The mechanics of the hitch are different, but we can figure that out. Spring rates, travel, that kind of thing will be the biggest questions once we establish the basic dimensions and loaded weight.
I think he's nuts, but to each his own!
Thanks,
Geoff
Anybody here ever attempt anything like this? The mechanics of the hitch are different, but we can figure that out. Spring rates, travel, that kind of thing will be the biggest questions once we establish the basic dimensions and loaded weight.
I think he's nuts, but to each his own!
Thanks,
Geoff