tractor for hilly areas?

[Trickhorse]

Wondering if there is a chicken tractor designed to work on hillsides? All the photos show flat grassy areas and all I have is summer dry hillsides here.

 

[chicken_noob]

Id say that long as you can pull it up the slopes...it isn't gonna roll away or topple over and all the base is on the ground then it should worrk anyplace. Just my 2cents.