Zoetis (ZTS), the animal-health company being spun off from Pfizer (PFE), was up 18% early Friday morning after its IPO priced above the company's expected range. Zoetis raised $2.2 billion after it priced its offering of 86.1 million shares at $26 each, above its previously stated range of $22 to $25. It was the biggest IPO raise since Facebook (FB) raked in $16 billion last May. The company sold 20% of its shares, with Pfizer retaining a