Like everyone else here, I think they'll be fine. A vet I worked for felt that it wasn't necessarily that chocolate was toxic, it's just that if there is a lot around, animals will eat all the chocolate they can which can then create toxicity from the quantity.
If you want to do something for them, do make a lot of water available, and you can add some milk thistle extract (either 2 crushed pills per gallon-- a handle of the dried herb per gallon made into a tea; or 10 drops of a decoction in a gallon). This is a very effective, natural, and safe liver cleanser.
If you want to do something for them, do make a lot of water available, and you can add some milk thistle extract (either 2 crushed pills per gallon-- a handle of the dried herb per gallon made into a tea; or 10 drops of a decoction in a gallon). This is a very effective, natural, and safe liver cleanser.