The winter's been mild, but still rough on my coop. Specifically on the wheels. Every time I go to move the tractor, I find two flat tires on my coop. Since I've only been moving the tractor once a week, I've been applying the lazy-man solution. A can of fix-a-flat to the rescue Now that Spring is here, I'll soon be moving the tractor daily. So I need a more permanent solution. I could simply patch or replace the wheels with new ones, but would I have the same problem next year? Maybe I should just get rid of the pump-up tires, and get some rigid ones.? Or maybe I should rig some kind of support (thinking "up on blocks") for when the coop's at rest so that it doesn't have to support all the weight all the time? Other suggestions? Thoughts? Here's a photo of the coop for reference. The wheels are 8 inch swivel wheels from Harbor freight. The coop is 3' x 4' and pretty darn heavy. Here's a link to the wheels: http://www.harborfreight.com/8-inch-pneumatic-swivel-caster-42485.html They're supposed to support 280 pounds.