Most senior vitamins have supplements for joints, but you already give that to Callie. I don't know of a good senior multivitamins. I like Nature's Farmacy Ultimate. I know you said a powder wouldn't work, but their formulas are usually tasty. I'd be happy to send you some to try to see if Callie likes it. You can compare the ingredients with senior formulas, but I really trust Nature's Farmacy. It has some calcium, but most multivitamins have little calcium. I have some of their calcium also if you want to try it.
https://naturesfarmacy.com/canine/ul...-ultimate.html