Time out will not upset her or rile her if introduced carefully and gradually remember she is very young. Puppies like children get over tired then get naughty so they do need some time out especially around tea time I find. You need to find the thing that will calm her I use to find speaking in a soft voice even singing or humming they then start to relax like human babies do and hey presto they gently go off to sleep. She will stop but it is going to be a long journey and a lot of consistency and a lot of different ideas till you find the one that suits her. Try the bite inhibition link it does work if you keep at it she is also getting some mental stimulation from this kind of training which will tire her mind as well as her body being tired. Puppies wear themselves out physically by running around and playing but of course the mind is still busy so they find naughty things to do and nipping is one of them. The joys of puppyhood. I had a 6 month old staffie to stay recently for his holidays I am inbetween dogs at the moment. He was teething and by tea time became unbearable with his laying on the sofa with you kicking your arms with his back legs ouch !! and his nipping so one evening it took at least 10 goes to stop him gently removing him from the sofa telling him no and popping him outside the back door he eventually got the message. No shouting not leashing him up and I have no crate we did gate him in the kitchen on the odd occassion mainly when we were eating he had no manners at all. Just consistency and my voice getting firmer every time. He couldn't be walked his owner had not had his puppy innoculations done and I feel sure if I could of walked him he would of been much better. He went home with better manners than when he arrived but it was the hardest 9 days work I have done.