Went to Tescos yesterday and had to queue in a well spaced line outside the shop. I admit I pushed in front of five ducks all patiently waiting. One stridently objected to my so doing and quacked loudly. I apologised profusely to this individual, a rather handsomely plumaged fellow. When the lady on the door admitted me, a counter assistant shouted across "Keep the ducks out Vera, I know they are hungry so you can't blame them for trying to get in!" Animals and birds are not stupid and know how to identify food shops perhaps the assistants had been giving them stale bread or somesuch.