Hill's Pet Nutrition is facing a class action lawsuit, which was filed at the U.S. District Court for the Northern District of California on 12 February. The suit seeks financial penalties and prohibitory injunctions to prevent Hill's from selling pet food with a hazardous Vitamin D content.The lawsuit was filed by Schubert Jonckheer & Kolbe LLP. Based in San Francisco, the law firm specialises in consumer and financial fraud.