Hello, we currently run our biggest selling product for a 2-3 week period with the same lot number since the lot numbers for the main ingredients do not change very often. We sometimes dip out of the customer's packaging and run our private label during the packaging process and then go back to the customer's packaging. They keep the same lot number for private label and the customers product. I mentioned I think we'd need to change lot numbers but looking through previous threads I can't find anything concrete. They said they shouldn't have to change lot numbers because it is the exact same base product. I think being a different packaging/customer we should change the lot number. Thoughts?