I need a little help. I see lots of tips about helping an old cat adjust to a new kitten, but I haven't been able to find any tips to help two completely new kittens adjust to each other. I just brought them both home yesterday. One is about 4 months old and the other is 6 months, though the younger one is considerably smaller. When I let them "meet" each other before I brought them home yesterday, they were fine and one was even licking the other, but as soon as I got them home, they changed. The little one hisses and growls at the other girl (they are both female and spayed). I know they're having troubles because of the new surroundings, and I know this will take time. In the meantime, I just want to make sure I do everything I can to help them out, and also know what NOT to do so I don't ruin their chances of bonding. Any suggestions? Thanks!