my greman shepherd

Question
i have a 2 year old greman shepherd i got him when he was 9 weeks, well 2 weekends ago we hd alot of people but he is ok with that. but whn i went to go feed him, he started to snap at me, and when im out of the fence he trys to bite through it to get me, im 16 years old and now scared of my own dog, i was raised all my life around greman shepherds and never been through that, can u please help, i cant even see my other 2 dogs, Abby 2 yrs yellow lab, n chipper 2 yr old beagle, i dont care abut jake the greman shepherd anymore but he wont let me near them, and abby is fixed so it cant be because of her

Answer
This is strange.  At 2 years old, his personality is still developing and sometimes at that age they do challenge your leadership.  I would start with a vet check up.  It could be due to a physical problem.  

If not, I guess it is back to basics.  The key to most behavior problems is approaching things using the dog's natural instincts. Dogs see all the people and dogs in the household as a pack with each having their own rank in the pack and a top dog. Life is much easier if the 2 legged pack members outrank the 4 legged ones. You can learn to play the role of top dog by reading some books or going to a good obedience class. A good obedience class or book is about you being top dog, not about rewarding standard commands with a treat.

If he isn't neutered, I would also do so.  There is no reason to leave an aggressive dog intact.

If nothing help, you may need a private trainer or behaviorist to observe him and identify the problem.  Some things can't be fixed over the net.