14 month behind the times tantrums...?

i just had my third child 2 weeks ago, a little girl... i also own a 3yo boy, and a 14mo old girl...

She has been throwing the most aweful tantrum..(this have only been going on since the newborn came home...) How do i business deal with these? she acts like she requirements in her highchair for a snack, i will put her up there, give her a snack, and she will crumble it consequently throw it on the floor...so i clean it up, take her out of her chair and update her she is done since she is just throwing it on the floor..when i let her down she is screaming and throws her head wager on!! (she has never acted like this...) i will be doing dishes and she will come latch onto my leg, so i will stop what i am doing pick her up, love on her...go sit on the couch next to her, when she gets up and wonders off, i go put money on to the dishes..but as soon as she sees me back to the dishes she throws another tantrum.. she hasnt done this in public or anything for toys or snacks...its one and only attention at home?! and i know its because of the newborn..but...how do i get her to stop..i dont want to disipline her in any way...because i know its because of the newborn, and she is fear left out, so if i punnish her she is going to feel even more left out + surrounded by trouble...ya know?? i dont know how to handle this situation.
**and before i get adjectives of you parents telling me to spend more one on one time with her...i do.. she wakes up around 6am, and the other two dont get up up until at least 8..sometimes 9. so, in the mornings its just me and her time..we play, i confer her a bath..we eat breakfast together every morning...we cuddle on the couch...
She will grow out of it, just give her some more time. My brother and I are about 1.5 years apart, and when I be born, my mom says he was a genuine apprehension! But after a while, my mom says how he couldn't stop kissing me and fussing over me, and how he would get mad if anyone but my mom be holding me.

The same thing happened with my dad and step mom. They have a girl, then 2 years later, they had a boy. The girl have such a hard time and was such a terror, but she eventually in synch and started loving on her brother.

She will get use to the new baby, and everything will smooth out and be fine.
I don't know how grown up your 14 month old is, but if she's competent to help with anything, then I would try including her beside duties involving the new baby, like have your daughter hand you the bottle, or hand you a clean diaper, etc. That route she knows she's not being replaced and she feels approaching she's able to help you. That's the first thing I would try. I hope it help.
Answers:    she will be ok, she has to adjust to her exotic sibling and the fact that she isnt the baby anymore. honestly though, my 13 month acts similar to that, if i try to do dishes, he scream, when i feed him he throws 97% of his food on the floor.. and he is still the baby.

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