Update everyone:
The petition only has a few dozen signers so far, but many of you left great comments to drive home the point. I've decided to forward the petition to Petco now. People can still sign it, and hopefully the number will continue to rise as Petco's customer service department employees see it (assuming someone at customer service at their corporate headquarters does indeed LOOK at it). Thanks again everyone who signed and commented. Together, maybe we can shake this tree.