Has anyone noticed BT families?

I’m fairly end game (chapter 11), first run through on the PS5 upscale (no spoilers please). I had it on PS4 from release but every time I started playing it something new and shiny would distract me from it.

This time around it’s really clicked and I’m loving every slow snow laden step over a mountain.

I’ve started to notice a trend with the BTs in that there are what seem to be a family of them in each area. The baby BTs I find a real pain, smaller, harder to see and fast once they lock on to you. But the babies are always with “parents”.

Also, when you cut a BTs cord you get a “like” from that BT, why is that?