I bet the relatively high (8"-10") sides on the feed pans help SMB feel safe/defend their nests - an added bonus to helping keep the gravel together year after year.
"Live like you'll die tomorrow, but manage your grass like you'll live forever." -S. M. Stirling
![[Linked Image from i.pinimg.com]](https://i.pinimg.com/736x/ed/b5/e7/edb5e7f935843b996cf52be593c9ebd2--smoothie-smooth-collie.jpg)
