How can I solve the yellow spots in my backyard because of my dog?

Water the grass well IMMEDIATELY after your dog goes. This dilutes the urine and prevents that chemical burn. But it has to be immediately.

You need to put out lime often to combat the urine affect on your yard and to keep down odors as well as disinfect! If you use your backyard, there needs to be a separate area for the dog and one for the people.

its the urine he does little horror ruins your lawn

make a solution of a gallon of water and two tablespoons of baking soda

Take your dog for more walks away from the house......like a dogie park

Scratch the surface, place fresh soil on top and reseed.