Is your main account pretty old and built up with trophies/avatars?
Not that it's super important, but if you have 4 t8+ UCs and a youngish account (By young I mean less than like, 7 years old) with
hardly any visible activity, it'll definitely raise some red flags.
I suggest staying content with the UCs you have for now, build up your account a bit
and equip your current pets with petpets and petpetpets (if you haven't already). If it's a rare, high tiered pet you're wanting to purchase,
there's always a chance someone is watching it or knows of it that's on the PC. If you HAVE to have this pet, let it sit on a side account for a while, consider using VPNs like @
(you need an account to see links) mentioned and fake a trade, do this over the span of a few months. I don't think being over-cautious is possible when buying pets, people are nuts on the PC. Just be careful, and don't get too hasty even though it's hard not to show off your pretty new pet!
DO NOT GO TO THE PC.