Hi. I have had 3 Featherfin Synodontis catfish (1 fully grown at 8inch, other 2 5-6inch each) they have plenty of hiding spots. I recent aquired 2 large salmontail catifsh off a guy who couldn't take care of them anymore and who's tank was very small. At the moment they are in the same tank as the syndontis cats (only for a little bit till I get a bigger tank) and they are giving the salmontail catfish a lot of aggression especially the smaller 2 synos. Is this normal for the first few days of them being in the tank. They have currently been in there for about 16 hours.