Credits: bangtanpets.tumblr.com, https://twitter.com/BTS_twt/
So guys, here are the pets that are shown in pictures with the BTS' members or they themselves posted it on Twitter. Even my sources can't guarantee if they really belong to them.
Unnamed Cat:
Unnamed Dog 1:
Unnamed Dog 2:
Unnamed Dog 3:
Unnamed Dog 4:
They said, this is Cloudie, Jungkook's dog but I can't find proofs that he said it himself that the dog is his.