Rage Syndrome

[symondneil]

I know a friend through a forum, they bought a mixed cocker spaniel puppy, love him and raise him as their own kid. Now the dog just turned one year old, and started to show rage syndrome, attacking the owner for no reason. The bite was quite bad (they showed me the injury picture)...and this is not the first time attack.The young couple was thinking of giving up the dog for adoption.

I personally think it is not easy to find a good home for him, as the adopter has to be very experienced in handling this kind of rage syndrome dog. But to euthanize the dog also very cruel too...any other suggestion?