If I use the nail of one cat only, would I treat the siblings too then? Spooky2 October 10, 2020 08:45 Follow No. DNA is unique to the individual it is taken from. For more details, please check the link: https://www.facebook.com/groups/spooky2/permalink/1732280446933851/ Have more questions? Submit a request 0 Comments Please sign in to leave a comment.