Hi Soph M.
While I’m sure the woman at the pet store meant well the advice you received was inappropriate and will over time surely lead to problems.
Strombeck’s recipes were based on the nutritional information known at the time but today are considered unbalanced. Additionally, multi vitamins differ significantly in nutrient profile and because human supplements have increased the Vit D levels in them in response to human findings the levels are too high to supplement a canine diet.
If you haven’t yet looked at balanceit dot com please do so. There is an interactive tool in which you can choose what ingredients you want to feed and them it balances the diet and tells you how much of the balance it supplement to use. Balance it is run by a boarded veterinary nutritionist.
