We had friends that stayed for a couple of weeks recently. They left more than one LARGE carton of cornflakes. We don't eat them... 
.....But the ducklings scoffed into them with gusto ( and a splash of milk!!! )  We also notice they have a particular fondness for our left over boiled rice and chopped carrot tops too!. 
Today when we were moving compost they where treated to a guid few choice earthworms. Turns out these are worth fighting for!  
 
   
  
   
 
  comical to say the least.