Place the mushrooms and label in a small paper bag, or a tube of wax paper. Twist the ends of the tube to keep the collection together. You do not want to risk mixing safe and poisonous species together. Most mushrooms are edible, in the sense that eating them will not harm you. Not all of them taste good, and good taste is no guarantee of safety.
People die every year from eating tasty but poisonous mushrooms.
The tarnishing of silver coins cooked with mushrooms is no proof they are poisonous. Seeing an animal eat a mushroom is no guarantee of its safety. Animals' digestive systems and metabolisms are not identical to ours. Until you have some experience, be very careful. Mushrooms contain many chemical compounds.