My nine week Vizsla pup is adorable and good for most of the time, EXCEPT in the last few days he's developed some really worrying behavior. His playful nips and crazy half-hours, which used to be quite easy to deal with, have turned into full-on bites and one and half-hour manic freak outs - three or four times a day. He gets a crazed look in his eye and is desperate to bite us, no amount of time out/sticking toys in his gob/yelling 'no'/walking off and ignoring him seams to make any difference - he just comes back for more. This happens three times a day, and he's getting bigger and stronger daily. It's like he's got an insane frenzied energy. Do you think when he's finally allowed out for walks it'll help get rid of some of his energy? I play with him LOADS, give him loads of attention and love,I'm at home all day, but he's getting more and more edgy. To be honest I'm a bit freaked out by it. He's turned from eager to please, playful little sweetie to hound from hell - he's drawn blood twice already.Any advice?