Board Thread:Naruto Discussions/@comment-46033540-20200608161608/@comment-681696-20200608175354

There are multiple ways to get someones DNA perhaps Kabuto get Deidera's DNA from his saliva on one of his unexploded bombs or a blood from the Deidera's wounds or the shuriken that wounded him or perhaps from sometime before his death, after all Kabuto was pretending to be a spy for Deidera' former partner so him might have a chance of getting a DNA sample from something Deidera touched.

As for Hiden he was never reanimated but even so then it wouldn't be hard to get his blood as he has likely left his blood all over place with ritual circles made of his blood and weapons that have been used against him.