Our puppy was doing a similar thing. The first few nights he slept right through but later down the track he would wake about 1am. One of us got up to him, took him straight outside for a wee/poo and then straight back to bed. He cried for about 15 minutes the first time we did it and the next night when he woke again at 1am, we repeated the procedure. He soon learnt that waking up at 1am would result in a toilet break and nothing more. We absolutely adore our 10 week old puppy but he's not going to be boss.By getting up to him more than once and putting him in your bed, you are only creating a rod for your own back. The fact that he is carrying on perhaps implies that he is getting the hang of the toilet training and when he wakes up he'strying to do the right thing by letting you know. The aggression might be because he is forced to do it where hedoesnt want to. Anyway, this isjust based on our very very recent experiencewith our pup. He absolutely doesnt wake up at night anymore and is very keen to go in the morning! Good luck and let us know how you go.