Hi Ayesha,
I think this will be well more than enough experience, although I'm a Y13 going into medicine and not veterinary medicine, I've found that it's not about how long the work experience is for, but more about how much you learn; as long as the placement is longer than a week, it should be enough for a paragraph in your personal statement or something to talk about in any interviews. A student on a 1 week WP being proactive and asking questions about specific treatments they see will learn a lot more than say a 3-week student just watching quietly.