[CorgiMum]

Before we made a special potty area, previously Monty's urine burned the grass too.

This is what I found worked a charm. Lime. If you get hold of a piece of gyproc, (new construction area) rip of the paper if you can to make it look better and break it up into small pieces. Put that on the grass burns and keep it well watered for a few day and you should see the grass coming back greeen again.

You could also have a watering can on the ready and water in the urine soon after it hits the grass.

Some people have put garden lime on theirs, now I haven't tried that so I don't know if it works or burns as well.