I'll be at the Writers Digest in New York at the end of July and I'm going to the pitch slam. Can I just bring a query for you to look at, even though it's YA and not what you represent? I'd like to say hi and get something out of it. And I have to pretend I'm doing something bc I'm helping a friend of mine. (She told me bc I paid for it I'm participating.) I just want to be there for moral support.
If you can find me at the Pitch Slam you'll have traveled back in time about five years. I'm doing a presentation at the Writers Digest conference here on 7/31/15, but I'm not taking pitches. Remember, I'm not a fan of pitches at all.
However, to the larger question of asking an agent for help at a pitch session, go right ahead. You do want to be careful though about what you take to heart. Advice from an agent who's not in the YA trenches on a daily basis can be questionable.
I'll never forget listening to a panel of YA tourists talk about the category in ways that were just plain wrong....and while they were authors, the lesson applies to agents as well.
I critique a lot of pitches for things I don't represent on QueryShark, but it's mostly about form and clarity, rather than "can I include dinosaurs in YA?"