I have always fed all my birds varied fruits and vegetables, along with a good quality Finch/Canary seed mix, wild grass seed heads, spray millet, hard boiled eggs, dry egg food, pulverised freeze dried mealworms, live foods, mineralized grit, egg shells, cuttle bone, plus some birdie vitamins, etc. and they have done very well on this diet.
Now I am not one to say, that my way is the only way, but it has worked for me for many years, way before I ever got on our Forum.
There seems to be an opinion going around, that veggies and fruits are nothing but water and sugar and should not really be fed to our birds on a regular basis. I find myself questioning that opinion.
If fruits and vegetables, are nothing but sugar and water, why are we advised to eat them?
Now I know that we are not birds, and birds are not human, but as living creatures, we all need the Vitamins, Mineral, and nutrients which they contain.
Now don't get me wrong, I am not saying that we should overdose our feathered friends with fruits and veggies, but I sincerely believe that fruits and vegetables are important for them, as they are for all of us.
Here is a site, which you might find interesting, plus a list of fruits and veggies which I feed or have fed to my birds along with their nutritional contents...
https://www.omlet.co.uk/guide/finches_a ... fresh_food
Romaine lettuce:
https://en.m.wikipedia.org/wiki/Romaine_lettuce
Red Swiss Chard:
http://www.whfoods.com/genpage.php?tnam ... ce&dbid=16
Broccoli:
https://en.m.wikipedia.org/wiki/Broccoli
Spinach: (in moderation)
https://en.m.wikipedia.org/wiki/Spinach
Kale:
https://en.m.wikipedia.org/wiki/Kale
Cabbage:
https://en.m.wikipedia.org/wiki/Cabbage
Cucumber:
https://en.m.wikipedia.org/wiki/Cucumber
Beet Greens:
https://en.m.wikipedia.org/wiki/Beetroot
Parsley:
https://en.m.wikipedia.org/wiki/Parsley
Corn:
http://nutritiondata.self.com/facts/veg ... cts/2415/2
Carrots:
https://en.m.wikipedia.org/wiki/Carrot
Peas:
https://en.m.wikipedia.org/wiki/Pea
Bok Choy
http://foodfacts.mercola.com/bok-choy.html
Rapini:
https://en.m.wikipedia.org/wiki/Rapini
Dandelion:
http://foodfacts.mercola.com/dandelion-greens.html
Chick Weed:
http://www.specialtyproduce.com/produce ... d_9823.php
Watercress:
http://foodfacts.mercola.com/watercress.html
Alfalfa Sprouts:
http://nutritiondata.self.com/facts/veg ... cts/2302/2
Sweet Peppers:
http://www.whfoods.com/genpage.php?dbid ... =foodspice
Green Beans:
http://www.whfoods.com/genpage.php?tnam ... e&dbid=134
Beets:
http://www.whfoods.com/genpage.php?tnam ... ce&dbid=49
Apples:
http://nutritiondata.self.com/facts/fru ... ces/1809/2
Oranges:
http://www.whfoods.com/genpage.php?tnam ... ce&dbid=37
Banana:
http://www.whfoods.com/genpage.php?tnam ... ice&dbid=7
Blueberry:
http://nutritiondata.self.com/facts/fru ... ces/1851/2
Pear:
https://draxe.com/pear-nutrition/
Grapes:
http://nutritiondata.self.com/facts/fru ... ces/1920/2
Cantaloupe:
http://www.whfoods.com/genpage.php?tnam ... ce&dbid=17
Watermelon:
http://nutritiondata.self.com/facts/fru ... ces/2072/2
Honeydew:
http://nutritiondata.self.com/facts/fru ... ces/1956/2
On some of those sites, you may need to scroll down a bit to get the break down of Vitamins, etc. but it's worthwhile checking it out.
Hope this is helpful for all of you, to help you make an educated decision on what to feed or not feed your birdies.
