I haven’t used Petco delivery for this exact reason.
But the feed store at the bottom of my street does not and will not carry what I need, because apparently Timothy Pellets and rice bran are too esoteric for their regular customers. The other feed store I pass on the way to the barn (which I have used for 20 years) has got very hit or miss on whether they have things in stock–and when they do have it, they are more crippled than I am so I have to load my own truck, and the TSC near the barn charges me $10 a bag more for Maxiglo Rice bran than Petco would and won’t help me load my truck because there are never any staff in there–and the woman at the checkout desk wants to know if I’ve found God. (Oh, and they’ve been out of Timothy pellets the last couple of times I’ve been in, so I’ve found neither them nor God.)
So, it’s getting very tempting.