Thank you Bonsai, the thing I am worry is I bought them not even a week ago and have been told that they are males, but then when I ask the previous owner about their sex again after I bought, she said she is not sure about them and both didn't get neutered or spayed yet. So I am worry about their gender. And yesterday and today I got some problem with snow flake, he is kind of try to scare my everytime I come to his cage and put more food for him or when I try to pet him. He was slunging at me or try to turn around to bite me. He did a lot of hissing as well. That does at mean? meanwhile Raffy is very friendly and relax with me around. he even came to sniff my hand and run around me too.
Thanks for your advice.