OasisHummingbird Vita Drops High Potency Multivitamins – Wild Bird Nutritional Supplement, Promotes Brilliant Color & Feathering, Revitalizes Incoming Migrant Birds, 2-Ounces

Tried it out, humming birds seem to like it fine. I generally only add half the recommended amount though. I think that's 3 drops for 1 cup. Make sure the water isn't hot or you'll destroy the vitamins when you add it.

I’ve been adding this to our hummingbird feeder for about a month. I’ve since noticed how much brighter the males’ colors are! And I have a lot more visitors to the feeder! Such a great improvement to sugar water!

The media could not be loaded.  Started giving my hummingbirds these vitamin drops. I add it to the sugar water I make for them 8 drops per 32 oz. I haven’t seen any increase or decrease in the birds activity, but I hope they are benefiting from the additional vitamins!

I ordered 2 of these, one had completely leaked inside it's packaging. Since there's zero return policy I had to contact amazon to get a refund for it. I tried the unopened one in my feeder and so far only an oriole has returned to the feeder. I had hummers and orioles before. I'm keeping an eye out, but I think it's possible the hummers aren't into the smell/taste of the vitamins. I will update if the situation changes.EDIT: No sooner did I post this that the birds came back without issue. So really the only thing is it leaked out in the package because there is no seal on the bottle.

My Hummingbirds seem to be happy with the Vita Multivitamins in their food.

We have 3 feeders and go through about 1/2 gallon of feed a day. I see some reviews that say their hummers shun this stuff, but our birds love it and seem quite healthy

I thought vitamins were a great idea but my birds shun the stuff. Fortified nectar is taken at about 1/2 the rate as simple sugar alone. Perhaps they don't know what's good for them.

My husband discovered this product and said our hummers need vitamins. So, we now give them vitamins and trust that science is good. He's happy, and hummers come often, so I think it's a win!