I don't think you can overdose on fresh dandelions much, the caution should be taken with extracts and dried stuff, and i would have thought with the root, when there is liver disease of course (or, as you say Donna, have a chat with a vet), but a couple of leaves here and there won't do any harm, dandelion is a very safe herb.

I am giving a few sips of dandelion tea to Digby once in a few days now.
what I meant in my other post is that for Digby right now dandelion won't be of much help and if he was seriously ill I was risking to give him dehydration, but he really seems fine in himself, hence a bit of tea is good for him, I believe.