A week,sounds about right,as you have to make sure Brodie,is all right,and then intoduce them slowly.Put something,atht Brodie,has slept on,so that the Resident Cat,can get the scent,of The Kitten.And,if you can,have them see each other,first. a Cat,is sometimes scrared,of the Kitens energy,I know that The Found Cats,were leary,of the Kittens,taht I Cat Sat.Good Luck.