Or buy another piece of same sod? Cut with machete on a board you don't mind nicking up. Dig out the dead spot and lay down a new piece?

Thanks for the feedback on the sugar.

I wonder if the grass became over fertilized from the sugar effect???

Gypsum seems to work pretty well for handling the salts from urine. I wonder if you would have better results by combining gypsum with sugar (maybe molasses instead of table sugar?). Maybe I'll experiment with this myself...

i'm not saying that sugar does not work. maybe I was too late. In the spring I feed my hives a 1:1 mixture of sugar syrup if needed. that's what I put on the pee patches. the hound has started on a new spot so maybe i'll try granulated sugar instead of syrup there.

Y'all let us know what worked and doesn't.