Im not able to pin point any one specific event to be able to say for sure what happened to my duck. She lives in the backyard with my dog and forges freely all day. I feed her crackers, bread, cat food, and then all the bugs she eats during the day out back. Last week she ate a penny while inside the house, i assumed she passed it, but now im wondering, since shes in the grass all day im not able to see if it passed for sure. online i read niacin might help if the problem is a poor diet? would really appreciate any feedback!