We manufacture and supply to retailers in the US, via a distributor, a trademarked liquid animal feed product. Recently we have discovered that one of the retailers has been wiping off the best before dates and batch numbers printed on the bottles and saying that we did never provided these details. I have been told they are allowed to a wipe these off. Is this legal? What can I do to stop it? Also, can we force the retailer to stop selling the product once it has expired or ideally close to expiry?