I bought my muckboots ( chore/hi)locally, and LOVED them! I wore them all winter, they were the best boots every, finally something I could just tromp around in and have no worries about keeping them clean or ruining them.

Mine last about a year. then the sole on the right boot started coming unglued. It slowly worked itself all the way up to the ball of my foot. I re-glued it with some shoe goo - that lasted about one day. it could have been user error though, I will try re-cleaning them & gluing them again. For now I sound like I'm wearing a flip flop while I'm out doing chores. boo.

I suggest taking them off by hand, I may have caused the sole to come loose in my style of taking my boots off - which doesn't seem weird to me, who wants to grab their freshly mudded & manured boot with their hand!?!  I would pop them off by hooking the heels and pulling them off. ( they even have a spur rest - which kinda invites you to remove the boots in that manner)
The other boot hasn't come apart, so maybe 1/2 of my pair is defective??