collie protection or just aggressive

[holly]

my nine month old collie has always been for me at one point he wouldnt let my boyfriend walk him or hold his lead he'd just sit and couldnt be moved he also used to cry and sit near the day whilst i was out i eventually stopeed this just by making a fuss of him when i came home and i think he got that i would be back soon.
now when i walk him and a dog comes close he starts growling and barking and looking very nasty when he was young he was well socialised with other dogs and we also have 2 others in the house.
when he was about 5 months old a rottwiler grabbed him and realy shook him up so i dont know wether thats the reason i just really need to put a stop to it. i introduced him to a friends red setter and everything was fine with them
he seems sbsloutley fine with smaller dogs then him and with one exception a huge doberman that he'll play with when ever we see them in park he doesnt behave this way at all if my partner takes him out.
so if any one has any tips or idead on how to put a stop to this please let me know thanks xxx

[RobD-BCactive]

Know that horrible feeling, when a large aggressive dog takes an unhealthy interest in your pup. It happend to me when I was 14 and started taking the family Border Collie to the local park. An apparently roaming Alsation/GSD, just came running out of nowhere, and to my surprise had my pup in it's jaws around his tummy. I had to prize the jaws open and force it off by myself and carry the pup away, as it just would not let go. These were the Rott/Staffie's of the day, and often owned by neglectful iressponsible people. Fortunately the dog was not really biting my dog, or me, it was horribly stressful, but there were no long term effects apparent.

I'm afraid it's rather hard to follow your post, so perhaps you would best inquire at Vet's for recommendation of a good behavourist who can assess the situation.

If you take an interest in Doggie programs on TV, it is generally the owners rather than something fixed in the dog, so dog handling changes often help fairly quickly. Perhaps you simply feel anxious because of what happened with the Rott and your Dog's aggressive displays, and that worry makes your dog feel there's a threat. That's just a non-expert observation, dog owner to owner, not intended in any way to be advice.

[RDW]

Have you tried both taking him out together? Perhaps then he will behave for you and then realise he should behave for your partner too?