I feel like I'm such a downer! I have very different opinions on such things... But, since this is an information site, I'll just plug on ahead and give you some information on multivitamins so you'll have more pro and con and everything in between to use for decision-making. Okay, I went ahead and googled some stuff that aligns with my philosophy so it's in a more "medically formatted" article than a ramblings of an EBN forum member...
So... these are all people-related. Just take note that medical research on people is a lot more robust than dogs.
And from Reader's Digest:
(We don't do Vitamin D supplement either. Milk already comes with Vitamin D and being Filipinos, we have the skin tone to tolerate some sun. The beach is a regular part of our week).
And from webmd:
Added this one. It's from a Naturopath Scientist so may have some bias. But, it also aligns with my holistic principles: