It can, provided the degree is genuinely in the field the profession requires and the U.S. position consists of professional animal science work. The parchment title is not decisive on its own; the transcript and the program content are what an officer will weigh.
The credential and the position are examined as two separate questions
Eligibility here has two halves that fail independently. First, Wendy must be a Canadian citizen holding the baccalaureate the Animal Scientist entry requires, in that field. A degree labelled agricultural science with a substantial animal nutrition component will often satisfy that, but she should be able to show it rather than assert it, which means an official transcript and, where available, the university's published program description.
Second, the U.S. role must itself be professional animal science: formulating and evaluating rations, interpreting feed and forage analyses, designing feeding protocols. If most of her week would be selling premix and managing accounts, the position is sales and the category does not reach it regardless of her qualification.
Ask the employer to describe an ordinary week in writing before either half is assumed settled, because a letter drafted after a problem appears reads as repair work.