I have a 12-13 week old kitten Isis who i have had since she was about 4 weeks old......and today my husband adopted a 7 week old kitten from a shelter...he said he could NOT leave her there...her name is ya-ya. (dont ask cause i dont know hwere he got it from) Isis (older kitten) growels and hisses everytime yaya comes to say hello then isis runs away...the poor baby just wants to have some fun! When will Isis get over this and give her a chance??