Thanks everybody for making my furkids feel so welcome.
As for how Taz gets along with the ferrets, I'm not really sure what he thinks they are. But it's funny, all the cats treat them with respect. When they see birds outside their behavior changes instantly and they all immediately go into stalk mode. They show none of that behavior towards the ferrets and almost treat them as if they are cats. They seem to recognize that ferrets are predators and not a prey animal. Perhaps because ferret body language can be similar to that of cats. They hiss when they have had enough and want to be left alone. They arch their backs to make themselves seem bigger to a possible threat.
If anything, they seem to definitely enjoy watching them. Once the ferrets start doing their "wardance", that's a signal for the cats to start playing with each other. The cats will sometimes chase the ferrets, but it's all in play and sometimes the ferrets turn the table and chase the cats. It's too funny sometimes.
Oh, I forgot to mention that the dog absolutely LOVES the ferrets, the ferrets have NO fear of her, all 65 lbs of her, and the cats and dog all get along. Now if 3 totally different species can get along, why the heck can't humans figure it out?!?!