Sudden Agression

Question
I have 2 kittens that are from the same litter introduced to my home 2 weeks apart i had the runt first who is smokey and no longer the small one hes huge and jelly his brother, they are 2 months shy of a year and as night and day just last night the fighting became more than playfull between them now i cant stop the constsnt neer blood bath that is going on.they have there shots and bolth were very passive till now, how do i understand or fix this problem? they have been a part of this family for 10 months i dont want to say good bye to either i love my kittys they are so different and I love there unique personalitys.

Answer
You said they have had their shots but were they fixed/neutered? If not, this could be the cause of aggression between them. It should have been done at 6 months of age but its never too late so you should get it done. If they are already fixed, then it could just be them going through some growing pains not too unusual for cats. You will have to give them time to work out their territoriality. Meanwhile I would suggest you don't let them play together except when you can watch them. Other times I would separate them but use a screen or screen door or baby gate that they can't get through or over - in this way they can see each otehr but not hurt each other until they work out their differences during your supervised play.