Fear of other dogs?

Belive me I know what life is like living with a dog fear agressive dog. My Gizmo is great with people, kids, other animals but just can't stand any other dog. I have had months of obedience training with a trainer and read many books just to work with her agression. I suggest reading "click to calm" best book I've read to help any dog with agression and fear or at least to understand it. She was hurt as a puppy and it's taken this long just for me to get her to the point she's at now.

Bigest helpful hint I've found is when you go out load yourself with dog treats. Everytime you see anouther dog give your dog a treat, keep your dogs eyes off the other dog by holding the treat. Make your dog feel confortable around other dogs. They can sence your feeling and react to that, so instead of beaing afrade be happy towards your dog and make it feel at ease so other dogs don't bother it.

How old is your pup?
 
When his hackles go up, I wouldn't totally avoid another dog. When he does it along with arching his back up, he's trying to make himself look bigger and scarier. I don't believe (although I might very well be mistaken) that hackles are, in themselves, a sign of aggression but rather a sign of uncertainty perhaps even curiosity.
 
Do you know anybody with dog friendly dogs that you could socialize him with? That's one way to rebuild his trust. Also, should there ever be a next time, I personally would find a way to get an attacking dog off my dog and not let it keep biting my own. Continue to socialize him with other dogs and don't let the hackles be the determining factor of whether on not he can meet them. Does he growl or anything else?

He is 8 months old, no i don't really have anyone that has friendly dogs that I could socialize him with, my next door neighbour has a wolf x that can't handle how playful my dog is, my parents have a lab that is really jealous of my dog, so no there really isn't anyone i could take him to! I've socialized him with both kids and adults so he is really good with people so that is no problem, but he does get the odd person he is really unsure of. I did try to get the other dog off of my dog but it was a small dog off his leash and kept running away and coming back like a little bumble bee, my dog was on a leash and I tried getting away from the situation but the dog kept coming at us, the owners tried to catch their dog to stop him also but he ran away everytime they got close then came right back after my dog again so it was sort of hard to keep him from attacking my dog, if i was to let my dog attack back I think he would have done alot of damage to the small dog, this small dog has been attacked by a pitbull before and it was torn apart the owners told me, this small dog is just fearless. Well anyways they finally caught their dog and took him away and said sorry but now my dog totally puts up his defences when another dog comes around, he does ease off a bit when he does get around a friendly dog but he is totally cautious about it. Thanks I'll try giving him treats to try make him more comfortable and make it a positive experience, he'll do anything for TREATS!!! []