What is a good time to wait ?

We adopted George in August 2002.
We adopted Milly in Early March 2003
We adopted Milo in Late March 2003

Three cats in about eight months !!!

And if PayForIt and common sense hadn't won out, we would have also adopted Sooty late March as well.

PS. As the cat decides who he/she will live with, I would let the cat decide ???