My youngest (who's 13 now) hit the "terrible 2" stage at 9 months!!! He "terrorized" his older brother unmercifully. And no matter how much I told him no, he just looked at me with those big blue eyes and grinned - he thought it was so funny! It was rough on us cause our oldest was never like that - never! He was very laid back, mild mannered, just went with the "flow". I knew not from where the second one came from with his attitude....and there was a point and time I seriously wondered if either of us would survive. Hang in there, it does get better
Just have a heaping dose of patience on hand - and restock it often.