No, normal adoption fee.
We only see the cockers on COL, and I don't think many at all are returned. There are very many MT dogs here (I have had 4), and I only know of one COL owner who was keen to move the dog on.
Spend a day in their office (my daughter has spent many), and you will see how many potential owners are turned away. MT certainly don't want to re-home a dog more than once as it is bad for the dog, bad for the family, and bad for MT. Perhaps a dog is returned due to allergy / loss of job etc - these are things which wouldn't show up in any home check!
I think the tell tale phrase is "has the attitude of a working cocker". I guess who ever had him had underestimated their available time to give him the exercise (physical and mental) that a worker would need. Also, he can open doors, needs a 6 foot high fence and has to be kept safe.......
PS I think it's so amusing that the COL spell check won't allow the word COCKER!