The close-up of a parasitic worm.

The video opens with a close-up of a parasitic worm, with other blurred worms in the background. Animated graphics appear around the worm, highlighting its presence. The scene transitions to show the Zoetis logo and product packaging, featuring a bottle and box of 'Valcor'. The ad then shows a white and a black cow, emphasizing the product's application. Finally, it displays statistics about efficacy and weight gain, concluding with the Zoetis logo and copyright information.