In my experience my hav is NOT at all 'finicky' or picky and I think most people actually encourage picky eating by catering to them and changing thier food. Pick the best quality food you can afford and have access to and stick with it!!
My hav, Tillie would have been considered a "picky eater"... we kept her on the food her breeder was feeding her (Taste of the Wild, prarie formula) when we brought her home, but she would never eat very much, just a few kibbles here a few there, really, just enough to survive... when she was 9 months old she started having these very odd 'sores' on her neck and head, 3 weeks later these sores encrusted the backs of her ear flaps and I HAD to take her to the vet. He did scrapings, checked for mites, etc, then he suggested doing a blood draw because he was pretty sure this was food related.
Turns out Tillie is actually allergic to 90% of what was IN her food all those months!! SO, personally I think she is VERY smart, she wasn't being picky she was trying to survive by eating the least she could of the very things that were harming her!!
I HIGHLY recommend looking into doing a consult with Sabine (Dave can you post the link?). I decided to home cook for Tillie mainly because I did NOT want to deal with switching foods so many times trying to find 'the right one' and never knowing for sure if I was doing the best thing for her. Besides, over the years homecooking has proved MUCH more affordable for me than the high quality, limited ingredient kibble or canned.
Some people may (mistakenly) think that I am "catering" to my dog because I home cook for her, BUT people need to understand that I cook once a week, NOT every day. I give her the EXACT same thing day in and day out with very little variation. JUST like people who feed kibble.
AND people need to understand that in MY situation she was NOT being 'picky' or trying to work me, she truly had problems that she could not solve on her own and she NEEDED me to take care of her.
fyi, Tillie is allergic to: oats, chicken, turkey, duck, carrots, berries, FISH, green beans, peas, soy, corn, apples, tomatoes, rabbit, barley... those are just the top few ...
if you want more info pm me.