Today while walking on the beach I noticed a few seaguls without feet hoping around. I just assumed it was some sort of fish biting off the feet while they were in the water.
 
Sadly, next to these footless seaguls
were some with large feet (from swelling) that had fishing lline around the feet. It would not be long before their feet would drop off also. Farmers use this method to dock tails on sheep using elastic bands applied with a plier.