If fetching a beer is offensive to you, train your dog to fetch your fags n lighter instead? lol
And i cut up dime coin size pieces of sausage. And as each repetition is 1 behaviour = 1 treat , you need something really small, that can slide down witout chewing so dog does not lose focus AND can keep doing the behaviour. So any crap will do for now. How posh your 'crap' is, is owners choice, and dogs sometimes, as occasionally, you'll need something REALLY tempting, like steak! for a jackpot. Even food treats have their own hierarchy for my dogs, and most others find this too.
What one will do for a piece of sausage, is less than what one will do for a chicken wing!
We all have our price, dogs included.
Try to remember, its what your dog thinks is fabulous as a treat that counts, what you think is irrelevant in this matter.