Yes, get the mushrooms out of the yard if you can…it’s not easy, they keep popping up! Our young BC mix ate some mushrooms she found as a puppy…took her and a mushroom to the vet and, since, we could not safely identify the mushroom without tracking down an expert, which there really wasn’t time for, we decided (after consultation with ASPCA Poison Control) to treat as if it were poisonous. Induced vomiting (probably too late for that), activated charcoal, IV fluids to flush things through and the vet put her on a liver protectant. She was fine, but I’m pretty sure that mushroom wasn’t actually poisonous.
A week later, I found some, very obvious, Death Caps (Amanitas), in some woods we walk in (it was a big mushroom year). THOSE are terrifying, so we didn’t walk there (with her affection for mushrooms) until they were gone. Amanitas are horrible things and do kill dogs when the owner didn’t see the dog get it and can’t take quick action before liver failure sets in.
There were less scary looking mushrooms popping up all over our yard too, I pulled them up as best I could, but it was hard keeping up. I walked her on a leash, even in the yard, for a while until mushroom season was over.
I’m not sure what you mean by toadstool, because people apply that to different kinds of mushrooms. Amanitas are the ones to worry about (alot!)…they are typical cap and stem mushrooms and sometimes hard to tell apart from harmless mushrooms. The amanitas have a bulb at the bottom of their stem and a skirt around their stem when fully grown. Not being a mushroom expert, however, I don’t rely on my ability to identify them and treat all wild mushrooms as bad news.
I also learned, from the Poison Control folks, to keep a fresh bottle of hydrogen peroxide in my house at all times, and a dosing syringe. 5cc per 10lbs of body weight will make a dog puke everything up within 10 minutes. That way, we’d be able to get most of it out during the window when it was still in her stomach and THEN go to the vet’s if she actually got into a poisonous mushroom. I’ve never had to use it for a mushroom, but it did come in handy when my son left a massive chocolate bar under the Christmas tree and puppy ate the whole thing ;).