I have my newest 8 month kitten for 3 days now..she is getting use to me coming in the room by her. My other 2 cats(all female by the way) are kept seperate from her...my question...how long should I wait before I crack the bedroom door so they can see each other? I dont want to rush things with them but at the same time I would like all 3 of them to get use to see each other at least...any suggestions would be very helpful..thanks!!