What is an ex sample of if transgenic farm animals ever run into wild populations they can have extremely unpleasant effects on the natural?

If transgenic farm animals ever run into wild populations, they can have extremely unpleasant effects on the natural ecosystem. One example of this could be interbreeding, where genetic material from transgenic animals enters wild populations. This can alter the gene pool of the wild populations and eventually lead to negative impacts on their fitness and adaptability. Transgenic animals may also carry pathogens or harmful substances that can affect wild animals when they come into contact.