In message , Rachael Nex
writes
I have two dogs. As dog pee seems to ruin grass my two are taught to go
wee-wees on a concrete area outside my backdoor. This is ok as I wash
it down every time they wee and the water runs down into two drains
outside the house.

Having trained them thus far, any chance of training them to wee right
next to the drains? (Though I expect this has occurred to you too...)

--
Klara, Gatwick basin