It may sound funny, but this has happened to several patients over the years. Just as animals like the smell and taste of your shoes, they will happily munch on your prosthetic eye if it is left unattended. We would typically recommend wearing your eye full time, but if you need to remove it for any reason, make sure you store it in a safe place, out of the reach of any of your four footed friends.
This is an example of a recent occurrence, note the small bite marks that cover the front and back surface. This may seem hopeless, but if the acrylic is not too old, we may be able to grind through the marks, add back the acrylic and return the prosthesis to its original condition.