well, i wouldn't do any more than you are now.my dog plays with my fuzzies and i can leave the room. thats cause their is POSSIBLE way he would hurt anything unless it hurt me or my sis. i don't think you cutie would hurt her,but i don't know her. i know you love ya cat but i just don't think that i would take the chance. he seems quite fine just excited right? maybe hes o.k. but does your kitty like simba?