Slab

Yep
that can cause a lot of headaches if not caught in time

Also as guys have mentioned is clearing the pee hole

A little insurance I usually recommend in our area from
preventing those pesky mud bees plugging up that hole
Is I usually carry a few twist ties for inserts
if exposed to the outdoors for a number of days
the twist tie doesn't need to be pushed in very far
just enough to prevent any bugs or bees laying
their eggs plugging the hole
being a loose fit should blow out the tie should you
forget to remove it
Hope this helps

billygee