PETstock is currently doing a site wide promotion where you get 24% off on most full priced items. It says "24 hours" but it's more like 36 hours as the promotion ends mid night on 21st of April.
Online only and these items are excluded from the discount: sale items, gift cards, services and equine products.
It amazing how much of a mark up is there.
I buy Black Hawk food for my cats and its $28.95 at Pet Circle and almost $31 after 24% off at Petstock.
I guess from the buying and pickup convenience its better as you don't have to wait, and there maybe other great deals on non-food items, but just saying…