At some point we see Patrick(Matthew Fox) getting bitten by a creature and you can see his wounded neck when he tries to disinfect it with alcohol. Later on, when they are being attacked by many creatures in the house scene, you can clearly see that his wound is not there.
You can't give a dog chocolate. Especially that much chocolate over it appears a long period of time. Chocolate is highly toxic to dogs. The dog would be dead long before it was even bit and killed.
It is the cocoa in chocolate that is toxic. These are presumably milk chocolate chip cookies which would have a minimal cocoa percentage. Not healthy but not toxic.
It is the cocoa in chocolate that is toxic. These are presumably milk chocolate chip cookies which would have a minimal cocoa percentage. Not healthy but not toxic.