[morgante]

> There's a difference between shipping on a pallet in the same semi trailer as 51 other pallets and shipping in a cardboard box from a fulfillment center.

True, but Amazon (amongst others) is increasingly making the economics of delivery more feasible.

> Who's doing pets.com's modern equivalent now?

Amazon is: http://www.amazon.com/s/ref=lp_2975359011_ex_n_1?rh=n%3A2619...

So is Wag.com (a subsidiary of theirs): http://www.wag.com/