I was dressing up this pet when I found an issue, many items such as the 2017 Holiday Cloaks are adapted to the "PPS/puppy" body type instead of the adult:
It also seems that some headwear such as the centurion helmet is maladapted, with that helmet not fitting the pointed ears of this dog.
If anyone else has this pet, it would be a great help if you tried to dress it up, to see if these items work or not on your end! Maybe it's a problem with my cache or something. Since I had dressed up a few PPS on this computer.