There must be something seriously wrong with DD. She is driving me INSANE!

Honestly, if she was like this all the time, you'd swear she was ADHD. She is acting like a nut case. First off she would not leave the cat alone. Always picking it up etc and you could tell the cat didnt like it. Sowe told herto stop god knows how many times. Then she started pretending to step on the cat. Telling her god knows how many times to stop. Then she kept annoying DH like full on jumping on him, hiting him, hurting him, covering his nose and mouth(which she has been doing to DS lately). So we tell her it's time for bed. She goes even crazier. Finally get her into her room. She is in fits of laughter and unresponsive. You call her name, she will not answer, even smacking had absolutely no response. She just continued to laugh and thrash about. This goes on for about an hour. I just walked out of there and she comes out again. Now she is ****ing DH off again by doing the same as before. I told her, if she did not stop i would take her to the hospital(which she hates) as only sick people act liek this. She said she is only playing. I ask her to stop,she needs to sleep. Nope. Then strts rattling off about what she wants for her birthday/xmas etc. Says who she wants come. etc. Saying this while jumping on her bed still laughing!! I told her,she wont have a birthday/xmas if she keeps this up. No response, total ignorance.

I have NFI! what to do with her. It is like this most nights. Like i said she acts like she has ADHD, but it's only after dinner. Even before bed time. What hell am i to do?