Thanks for all the help from this forum.To answer some questions, yes the breeder knows and wants him back,but I have to seriously think before making this decision.The breeders are very stern and uncompromising and I am afraid there will be a "Death Row" finale.
By the way my dog is called Raj.Since posting on here I have read just about everything I can on Cocker madness/Rage,and I still do not think that Raj has this.It could be a form of nervous aggression that must be handled very carefully I fully agree -but Raj is basically a good boy at home, any rough play I now completely ignore,although I did read about mouthing on this website and I will give the link here if the Forum will kindly allow.I think it could help others.
http://www.jersey.net/~mountaindog/berner1/bitestop.htm The signs that Raj should be showing for Madness -Rage,call it what you will,are not truly present.He does not mind sharing any of his toys with anyone,and will freely give them up.He really likes me to hand feed him at mealtimes,I know this will be frowned on by some but anyway into the bowl my hand goes and he eats with no aggression at all.He lies quietly in the evening and I can put my hand on him while he is lying and stroke him, and he does nothing at all.He shows no aggression in the rooms he is allowed in and if I allow him on a sofa he shows no unpleasantness to anyone else sitting by him.He is excellent outside the home with people and dogs.
However if he picks up something in the garden or out on a walk that he really wants to keep,something like a stick or garbage paper,then I can only get him to let it go by a swap,eg a bit of cheese or a biscuit.No way could I take bits off him as he would snarl and snap at my hand.With a swap he does nothing.Also if he does not want to do something that I want him to,like washing his feet today with some soap and water, then we do get a bit of temper tantrums and I have to be careful.He seems very distrustful sometimes and I wonder if something happened when he was with his mother before I had him.
The Behaviour therapist has not seen Raj in a temper tantrum,only what I described to them.The Behaviour therapist from the well known animal charity told me that Rage is truly a medical problem, and he went into a deep explanation of medical terminology that was way over my head.However the bottom line was his last sentence"No dog suffering from rage can be made safe" .He also emphasised the fact that most solid Cocker owners who come to them for help do lie about the disposition of the dogs needing re homing.He did not mention about part coloured dogs only plain or solid coloured dogs.