See - those dogs are normal. We gave Duffy (our biggest Deerhound) a Pringle once, whilst at a show and he did indeed make a show, by nibbling round the edges like a dainty old lady - round and round and round
We discovered that Eddie likes the sour cream ones - he's not normally a crisp-eater, but I watched him slyly eating one that Penny had dropped.
My cocktail loved cheese and onion chrisps, he used to have a good old munch then fly off to the curtain rail and be breaking wind for the next hour. Was so funny.
my dog charlie like crisps but only if i suck the flavour off first... muggins will pretty much eat anything...except his own scabs...haha (he's clumsy and daft and falls a lot not just a scabby dog )