Time : Just now so around 14:00 on 19/01/2021
Game details : it's the achievement where you gather all 4 of the free combat pets it's french name is "bigremenent adorable"
Character detail : lvl ancestral 7, nuian in nuian faction class name is "démonologue"
expected outcome : i was expecting to get the achievement by getting the 4 pets to get the "pet hotel"
repro steps :
get a white wolfhound in early 2015
go away from the game till now
play and use the wolfhound
grow the other 3 pets

I tried to grow another wolfhound (all 3 to be precise), to put it in box and take it out again and to summon all pets.archebug.png