Help, I have a 9 month old Cujo....

[Susan]

I have a 9 month old labradoodle who can be the sweetest puppy most of the time, but when he is tired watch out.  There's no doubt my boy "Chip" wants to be in charge at all times, but I'm trying to stop this behavior ASAP.  He completed beginner training at Pet Smart about 2 months ago and did rather well. Now, today while walking my pooch he started to "attack" me   When I say attack I mean he lunges at me, barks, bites my arms and hands very hard leaving marks all over and jumps up on me.  He get this crazed look in his eye and barks at me as if he's talking to me   The only way to control him was to get on top of him and hold him down.  Then when I let him up he did it again. Did I mention how embarassing this is!!!!  He used to do this a lot and it seemed to calm down quite a bit after he was nuetered back in December, but now I feel like we took 10 steps back.  Anyone else have these "attack" issues with their  doodle??? 

[Susan]

Thank you :  )