Is it possible to but the ramp on the end of the tractor extending out? Or, you can build a ramp that goes down half way then turn it back 180 degrees. Kind of like a road up a mountain. It will only take up half the space that way. You will want your ramp off the ground a few inches so it doesn’t drag when you move the tractor. I have twelve chickens and every one will walk past the bottom of the ramp then jump up to the middle of the ramp (at least 12” up) to get in the coop. How many chickens are you planning to keep?