As I posted earlier, the Neet Kart is very different from most "game" carts. It was partly developed to use in back-country rescues of injured people, but also works better than any other cart I've seen for game retrieval, due to several features, including the in-line wheels.
It won't work in every situation, but it works better in rougher country than any other game cart I've encountered.
If anybody has an open mind, they might look at
www.neetkart.com 
