Originally Posted by
SunDance
Dandelion can cause diarrhea. I've never had a dog appreciate the leaves but did have one who'd behead the plants as he walked along. I don't remember him ever actually eating any. As long as you don't spray the dandelions that he has access to...including ones that park staff may be spraying....you should be OK. Limit him if his bowels get too loose.
I've never had a dog get diarrhea from any outside plants but I've removed some toxic ones from the yard, especially for puppies (jack in the pulpit and may apple are two that I remember de-fruiting some years).