I just found out that 1 (possibly 2) of them may not be able to come because they might have colds

Doesn't make much sense though - if they were sick, it would seem that they would ALL be sick, as they are all over each other, and have been for weeks. Better safe than sorry though. A vet is giving them an exam tomorrow, and I told him to go over them with a fine tooth comb, and that if there is any doubt that they are healthy, we'll leave them off the transport. I don't want 2 kitties who may be not feeling well dealing with the stress of a transport and possibly getting sicker

I will find out for sure one way or another tomorrow morning. Keep your fingers crossed that they are ok please!