Zoetis Inc. has experienced a plunge of more than 21% in its share price following the announcement of its first-quarter 2026 earnings, which missed analysts' expectations. The company reported revenues of $2.26 billion and adjusted earnings per share of $1.53, below the Zacks Consensus Estimate of $1.61. Contributing factors include weaker demand in the U.S. companion-animal market and increased competition, prompting Zoetis to lower its full-year revenue and earnings guidance.