1,300 strands of DNA from different animals are contained in a single hamburger patty

Supposedly 1,300 strands of DNA from different animals are contained in a single hamburger patty from McDonald's

"These packages contain meat from different animals from different places. Some of it is even from overseas. It's all ground together to make the juicy hamburgers that Americans love so much. A hamburger used to be the scraps left over from the slaughter of just a single cow.....

I suspect that hundreds or even thousands of animals contribute to the preparation of a single hamburger."