I think piggys are one very smart animal most of mine know their names and will come running or stop what they are doing if called, every morning Cuddles in the girls shed is up standing with both her front feet on her food dispenser reaching up as high as she can waiting to see what I've brought them, and dobby or dobbs as he is known comes running out of his pigloo for his mum (me) and artie just loves me singing to his face he popcorns around bless him,