That’s great...do they ever gang up on the tortiseshell kitty as an outsider????
(I would think not...Siblings trumps Markings every time!)
And yep-keeping them long enough makes them yours without fail...:)
The tortiseshell is totally an outsider. She has arguments with the gingers, but they get along OK. The 3 brother gingers are very loving to each other. Like someone said earlier on this thread they all have their own personalities, just like people.