Hi Judi, This is a huge problem. We would not want your dog to get sick again from eating those mushrooms. Firstly, You must reduce the amount of moisture in the area. Mushrooms thrive in wet soils. If you water your lawn frequently, you may want to think of changing number of times you water. Second, keep any decaying elements out of your yard. Mushrooms love growing around decay. This means lawn mower clippings (cut grass), pet waste, tree stumps, leaves, etc. You can also use a fungicide. Just make sure you follow the instructions. You will want to keep your dog away from the treated area until it is safe. Whatever method you choose, you want to continue treating your lawn to ensure the mushroom do not grow back. They can grow very quickly and you don't want to miss one.
Do you know what fungicide works best?
Will this keep them from growing?
I really appreciate your help. This is so frustrating. I have had dogs all of my life. I do pick the mushrooms when I see them. I diligently pick up dog waste. I never water. But I do let the grass grow long and let the clippings stay on the lawn for fertilizer. I have blocked off a small part of the yard so it is easier to check for mushrooms before we go out to play. I will start to treat it with a fungicide. Is there such a thing as a non chemical fungicide?