My sister's GSD ate some mushrooms in her yard. The dog showed symptoms come on about 6 hours later. He was just a couple hours away from death by the time she got permission from her husband (dont' ask) to take him to the vet. They did emergency surgery and manually flushed the digestive tract. He was still sick for several days. His sypmtoms were fever, lethargy, weakness, and tremors.

I want to thank you all for your replies and support, even though I wasn't able to read them til now, they are very appreciated and definitely needed. I'm happy to report that my pup Lear is doing fine, never showed one single symptom at any time; I thank the Lord for mercy knowing this could have turned out horribly wrong. If another mushroom pops up in the yard, I'm taking it directly to the university for analysis. Part of the reason, besides the chicken bones, that I decided against induced vomiting, was the vet said the drug she would use was by injection and was "similar to morphine" and that fact, coupled with possible further complications from vomiting up recently eaten chicken bones just didn't seem to me like a very good option. I asked if she had ipecac, was told no and that this injection was the only thing they used. I don't understand that. There's ipecac, hydrogen peroxide, and the activated charcoal that was mentioned in this thread and seems a drug that is like morphine is pretty severe if the results (vomiting) are the same as the other options. The other option she gave was the gastric surgery that was mentioned in this thread, also seemed too much for a 12 wk pup, especially since my "inners" told me to hold off and not act out of panic. Again, thanks to all who responded.