Yeah they can.. Weird thing is they haf been good together for some time.. I think it was partly my mocking that made him attack me.. hehe. I think i was like 4 or 5 and i can still remember it so well.
Oh speaking of which, i got these two cats who didn't get along well. Actually it was this orange 1 that doesn't like other cats. My Bobby was pretty cool except with Orange. Then one day they got into a fight n my dad tried to stop them and both attacked my dad! Lol. He got bitten. One at his leg and one at his arm.. there was so much blood all over.. I got freaked out. I accompanied him to the doctor and he got like 37 stiches on his arm!!! I was very dizzy watching the needle go in and out that wound. Ugh. Pets attacking each other : STAY AWAY. Best is stay a distance and blast them off with water.