Where is the proof that they genetically modified pigs and it went wrong

I'm doing a project to prove that Genetic Modification is wrong.
I found something on the internet a while ago that said that someone had tried to genetically modify pigs, and then they went blind and were unable to walk.
Can anyone source this so I can use this for my project? :)

they were trying to get more pork chops so they made a pig with 8 legs , but they found it could not walk and it just laid there and died .