I've given a multi from Natures Farmacy before, which I really liked...but I don't give multi's anymore bc I think they're getting everything needed from their food.
On the allergies, what are you looking for? Assuming enviro allergies? Are you going to try to do something natural vs other options? Allergies can be *super* tough in dogs, so while I wish you well in this search, be prepared for disappointment (I tried a lot of stuff too...)...and to go to something like Atopica, Apoquel, Temaril-P etc if needed...