Has anyone used concrete deck blocks to put their coops on? My coop is about 3 1/2 years old and is sinking in one corner. I saw these at the hardware store yesterday and am thinking of maybe cutting off part of the supports, moving the coop to a more stable area and putting it on these (with new 4x4s). Thoughts? You can see in this pic that the front right corner is sinking. One of my girls dug a hole there, but the coop is still stable.