Biosecurity is not just for farms, although it is primarily used on farms to prevent the spread of disease onto the farm. I could see a need for biosecurity in an animal processing operation to keep viruses and bacteria from entering the plant and infecting live animals. This might just be policies that you already have in place, such as: coming to work in clean clothing and showered, changing into clean clothing when entering work, changing shoes when arriving at work, washing hands, wearing a hair net, beard net, everyone that works at the plant cannot own livestock or pet birds (they can be carriers without showing symptoms). At our egg production farm we are very strict with our biosecurity practices and rely on every employee following all of them so we can protect our hens. Having footbaths, hand sanitizers, providing clothing and boots, truck washing, carefully monitoring every visitor, monitoring the movement of every visitor down to the garbage truck entering on site will help prevent the spread of disease. Food Defense is different than Biosecurity. You should be able to find basic biosecurity information in your governments documents. It may be for poultry but the basics are the same for every species. You won't have to go as far as a farm would, but should be following some steps to keep the animals and people safe that you are working with.