Well, Toto has been weaker than usual this winter, and bumps into Bobby every time he walks by, which infuriates Bobby and as a result, he attacks Toto. The vet says it is normal behavior, as in a pack the weaker would be attacked to save resources or something like that. So, at night, Bobby is sleeping with me. Tried to make it Toto, but he falls off the bed and that is dangerous at this age. The bed is high enough so Bobby cannot get on his own, he needs help to get up.
Problem was the cats were sleeping with me already. So most of the cats moved out to the other bed, I set up a down comforter for them, so all OK. But Icon -my cat, my namesake- refused to give up her place by my pillow. There were some initial tense encounters, and so every time when Bobby made a lurch at the cat, I just bumped him out of the bed.
Hence Bobby has learned that if he wants to stay in the bed, he has to be kind to the cat. So far, there are a few hisses and growls if they even look at each other but the cold has managed to make them past enemies bed partners.
Evidence (sorry for the quality of the picture, but it was taken in the dark):
Bobby is the white fuzzy cloud on the left.