I have a 6 month old male, i had him since 5 weeks as a foster, then adopted him. I since fostered an adult who didnt quite get along with other cats. My kitty kept getting in her face wanting to play even though the cat would hiss and growl. He just didnt care, he has no boundaries. I then thought getting a 2nd kitten would be a good idea. I got a 5 month old male, i was told he loves to wrestle with kitty friends. its been 2 days and new kitty is just overwhelmed by my other kitty hyperness. He hisses and growls. They do play with they're in separate room from under the door. But when face to face, my hyper kitty wont leave him alone, hes just all over him wanting to wrestle and its freaking the new kitten out. now im just wondering if this is normal kitten behavior since hes freaked out 2 cats now from his hyperness. and likes to bug a family dog who keeps getting mad it him. he cant take no for an answer. im worried new kitten wont adjust or any other kitten will since no other pet has. any advice?