I am looking to adopt 2 male adult cats. One is 6, the other is a bit over a year. According to their fosters they are both cat friendly. Since neither of them has any claim to the house, are both coming from multi-cat houses, and both like other cats, will the usual policy of keeping them separated for a few days apply? I know that these things vary depending on each cat and situation. If anyone has had any experience with this type of introduction, please advise! Thanks!