Alien Grass Circles

A week ago the neighbor called me over to check out the circles developing on the front nature strip.  I said I have never seen it before maybe we should get Project Blue Book involved.  This went over her head as I don't think she had seen the show.  Anyhow this morning I go out and circles are forming on our grass as well but also they have a gossamer fungus growing there.  Kaye the neighbor was out in her yard, she had checked into it and the problem stems from dog pee but from a dog with a uterine infection. The dog owner most likely does not know about their dog's problem.  I mowed it all up and now we have to give the area some fast grow fertilizer.   If they are not leaving barker's eggs then the're killing the grass.

about 1 metre across