well you got too keep the bitch off of the lawn really bye walking more often and being there if she goes in the garden . better still build a dog run for her to go on that you don't mind . as for the patches youl have too soak them and wait for the urine too go and reseed really and fertalize .

There is a product you can put in the dog's drinking water which is said to help but as NP says you really need to keep the dog off the lawn. Sorry!