Birds like picking their seeds that they throw into it back out, and I think the neighbors cats gotten into it a couple times. Working on some critter guards, but I’ve been spending my time modifying under the deck for a larger dog run for when I get a new dog. The sheds new, still in progress, need probably 8 more yards of rock underneath as well.
Slowly but surely, this week is a rest week though.
Those would just get filled with water and burst during the winter for me. If anything I would just go with some readyrod/allthread across. It’s also something I can slap in emergency wise anytime, just disturbs the root zone as I jab a rod indiscriminately through it….