My little angel is turning into a little devil...Please...Help!!

[Smita, Ollie and Juno]

We have trained with Ollie all these months and got all the problem behaviors such as nipping and growling under control. The last 3 months with him were utter pleasure. He loves to please us and has been very responsive to verbal commands. Now at 6 months, it is like a light went on in his brain.

• He can reach the table and kitchen counters and he is constantly surfing to find food.
• He pulls things off of our bookshelf which was untouched all these months.
• He has not been using the crate at nights because he was sleeping very well in the family room and would wake up only after we did. This morning we woke up to some unsusal noise. We caught Ollie red-handed with a chewed up laptop. He literally took a chunk off the corner of the screen. Since we caught him in the act we got the piece out of his mouth and sent him for a little time out. After that he sulked for a while and wouldn't even look at us.
• he has again become very mouthy and bites a lot during play.
• He is barking at people and dogs a lot during our walks (he is not agressive but very barky)

Is it adolescence already? How do we deal with this? Bitter apple doesn't bother him. Squirting water/lemon juice in his mouth is no use...he loves it and wants more. 

We are using the leash and crate more around the house but is there anything else we can do? He gets plenty of exercise so that is not an issue. He is our first dog so any suggestions are welcome.

 

 

[jessica (Rufus)]

i think mine is starting that now barky and nippy not aggressive though and he table surfed was 2 months ago at 7 months one time he grabed a piece of raw steak i turned around and there is was on the floor  he was licking it up i guess   he is 9 months now mabey another year of the teen years  lol