I have done that myself before rather than the ferret go back to its origonal place, i had a bloke knock our door with a very skinny ferret & a few hours later the phone rang and this woman was asking if i had taken an albino jill in , this was an albino jill , so i asked for description etc, the ferret was only 2 yrs old & it had only been missing a few hours , so i was quite shocked it was so skinny, its ribs were not covered by any meat , so i took it to the vets on the monday morning & they said it was healthy enough , just skinny, so it didnt go back there, within a few weeks