-
He will retrieve things, whether you want him to or not, it's best to start him on things you do want him to retrieve. A pair of vile stinky worn pair of rolled up socks is a good starting point.
'What's this then? (socks beneath nose, preferably not yours), 'fetch it'....
Ps: I would shorten that to 'drop', single word commands rule (unless you're my wife, who never uses fewer than 50).
We've been working on "drop it" though he is shit at fetch as he just looks at me like "what the fuck did you throw that over there for"