The prices aren't actually bad on Amazon for a bigger bag of food of science diet for both dogs or cats.
A bit of backstory is that I used to buy stuff like Purina as well (which was good both my cats liked it), but my cat who passed away last year got sick for several months so I looked at great brands and Hill's was listed with good affordability on Amazon. I've been loyal to it ever since as it was the only food that I tried that didn't make him sick aside from actually cooking him chicken.
This in particular is only about $85 Canadian and it's a MASSIVE bag