Mabel is going to love her feral doglike grunkles so much lol. When she meets them in the double feral universe :3
Oh absolutely. Just hopefully after they get a bath, or something.
Naturally, both Shermie and the twins will be wary about going near Dipper or Mabel at first. Shermie because 'holy fucking shit my brothers are snarling and biting' and the twins because they're trying to respect the principle of 'pack leaders get very antsy about you approaching their cubs without permission'. (the mother bear instinct)
But the thing is that a lot of signs and body language for the Doubles are different to humans. Due to their time with the Marirex, for example, they take baring teeth, snapping like you'll bite someone and mouthing more as a sign of interest/curiosity. For everyone else, this is a sign that YOU'RE GONNA BITE THEM YOU'RE GONNA BITE THEM YOU'RE GONNA BITE THEM
I can't imagine a lot of people will immediately appreciate the way they convey affection now, the invasion of personal space or the insistence on being in the room with you whilst you sleep.
These guys have had more feral experience than the average portal Stan or Ford, and they've only been reinforcing one another by being together so that it becomes wayyy more natural to them than to the average feral variant. The other sees no problem with the behaviour, so therefore neither of them do either.
Fortunately, the power of Mabel etc, etc. Ever the good heart and perhaps a little too trusting of others' intentions would probably try and sneak over to see her Grunks anyway and as soon as she realised they mean no harm, is absolutely delighted by how weird they are and how they express affection. She will also convey this to Dipper, who is stuck between being Starstruck about 'THE AUTHOR OF THE JOURNALS' and oh heavens the Author might eat me apparently.
Either way, the twins start routinely breaking into the basement (which is where Shermie decided to... not 'keep' them per se, but also keep them) and enjoying getting to know the grunks (Dipper is constantly trying to work on coaxing them to speak English more so he can ask questions about the journals) whilst Mabel is picking up the feral trait language. She's speaking it badly and incorrectly, but the Grunks would never tell her that and she's trying - which is incredibly endearing to them.
Shermie is not pleased when he finds out, but he's less angry than either of the Doubles expected which tentatively coaxes them to seek out the children at more appropriate times of the day and in the rest of the house too.
Over time things get a bit more calm :))




















