I visited a pet shop in Narberth in Pembrokeshire & was suprised by the different variety of dog food & stuff on sale--pigs ears, trotters, hooves,smoked bones dried liver & all sorts of goodies.There was also about 10 open  sacks of different dog complete foods e.g. Chudleys, Nutro, Dr Johns, all there for the customers dog to try before you buy! Never seen that before in petshops in the South West thought it was a Brilliant idea though!!