I just made me some home made axels on my tractor usin' rebar (17" cut to lenght, on each side) & then have two tubes encasin' the rebar (like ungreased bearings) & then I've a hammered out metal U bar holding the two tubes in place, onto a 2x4. The problem I have with this is that the rebar won't stay in place & the wheel loves to come out, I am thinkin' a lil' hole drilled in on the non-wheel axel side & then maybe a bolt & washer to hold the axel in place? But that would soon wear out, I know, from friction, so I am wondering what a more permenant solution would be. Likewise, the added 2x4 support for the axel, & the wheels on the tractor gives alot more clearance near the hen house for smaller dogs to get in underneath, what do you suppose I can do about that? Please allow me some clues or some guidence, as this is the first time I've ever done this. If you need more description perhaps I can post some pictures up. Thanks in advanced for all your assistance!