Just as it says above really.
She got upstairs without us realising and ate about two thirds of a bar, probably about 75g. Galaxy cookie crumble not dark choc (I think tha's worse, is it?). Only found out when son went to his room, so it could have been up to 4 hours ago, no less than 2.
She seems fine - is a one year old weimaraner, so pretty big - but I'm really worried as I've heard such things about it poisoning them.
Any advice?