Zoey ate her collar

When I got home last week I went to take Zoey outside. I looked in the drawer and realized part of her collar was missing. She had eaten the part that has the prongs and nothing was left. Well.. at least I think she chewed the piece up since I couldn't find any of the pieces on the floor. Either she ate the whole piece or shed chewed it up really well. I'm happy to say she pooped fine and hasn't had any problems since the incidence. Dogs eat anything they have the access to so we need to keep pieces away. Zoey has been known to eat a lot of things but this was the biggest. When we got her as a puppy we had to keep the bathroom door closed because she would eat toilet paper.