Hello Steve-

Your dogs are such a wonderful breed, and you have a great yard for them to call their home, however their urine is not a friend for your lawn. I have attached a few articles for you to read that might give you ideas for forming a plan to ultimately having a nice lawn, and allow your dogs to relieve themselves without veterinary intervention.

Your dog’s urine has killed you grass at this point. A current soil test entitled “repair of dog urine spots” (homesoiltest.msu.edu) would give you recommendations on the proper amendments to add to your soil, along with planning the repair. In repairing the brown spots, you’ll want to rake up the dead grass, add top soil, reseed and water in well. Training or having your dogs urinate in a location that is not on your grass— a dog park, gravel area, a non-turf location a walk away from your yard would be a blessing for your turf, and probably the best answer in the long term.

A strong, healthy turf will help your lawn recover, along with a new spot for your dogs to urinate.

Hope this helps!

https://cmg.extension.colostate.edu/Gardennotes/553.pdf

https://hyg.ipm.illinois.edu/article.php?id=988

https://www.canr.msu.edu/resources/go_green_lawncare_tip_sheet