My 2 dogs used to be together all this while and love to play together. But that day after back from 2 different groomers 1 of them start to fight and attack the other one. Now they cant be put together anymore. This happen whenever they are together. The other one has no issue but will defend when being attacked.
i read somewhere it could be due to the smell after the grooming where they smell differently hence the dog start the fight.
I am not sure if the aggressive one has been frightened when left alone with the groomer.
I like to seek help from you guys if there is anything i can do to make them back to usual them as before.