Anytime you hydrolyze any protein, monosodium glutamate is either produced or the assimilation of the protein produces msg...I forget which. MSG can affect dogs just as well as it can humans...and I'd suspect that a pup who already has sensitive tendencies just might be a prime candidate for one who'd react to the MSG.
I have to stay away from all hydrolyzed (or isolate) products for this reason.
I'd be afraid of causing Maverick some serious reaction and be double-checking with the vet to confirm that maybe the hydrolyzed diet is a different sort of thing. You wouldn't think dog food would be created this way but you never know.
Good luck!!!