To achieve this quality, farm raised trout are raised under optimal conditions using humane practices. Fish for slaughter are quickly and humanely euthanized for rapid processing. Fish reared for stocking in public waters must be transported under good environmental conditions if the fish are to survive. Successful producers routinely follow good production practices. Animal rights or welfare organizations form a diverse group.
Some organizations use legitimate legal and political practices to sway public opinion.
Some individuals or organizations may not use legal means to achieve their goals. Fish not consumed may be physically damaged during attempted predation. Birds may serve as pathogen vectors spreading pathogens amongst fish farms or transferring pathogens from the wild to a fish farm. Control of piscivorous birds can be difficult and expensive. All piscivorous birds are federally protected.