Chewy was a meme stock for a moment. Chewy (CHWY -6.68%) almost gained meme status this week. The stock jumped after Keith Gill, aka Roaring Kitty, posted a picture of a dog. Yes, that's it! But that's how memes start. Shares jumped as much as 10.6% mostly on Thursday, according to data provided by S&P Global Market Intelligence, but gave back most of those gains. At 3 p.m. ET on Friday, the stock was up just 5.3% for the week. The meme begins On Thursday, Roaring Kitty posted a picture of a dog and that's ...