If the ingested foreign body is small enough to pass out in the poop (i.e. an eraser from a pencil,
a very small piece of fabric like the eyes from a stuffed toy), then either a high - fiber product like canned pumpkin or a laxative like most cat and ferret hairball products (Ferret Lax, Laxatone for ferrets, etc.) can be used to help the ferret pass the object out in its feces.