Shear-chan the watchdog...
You will only see the difference from other dogs, if You take notice of how her legs are folded into the animal's feet.
Thus she is unable to exit the costume without exterior help.
Lucky this subject has no breathing problems, that at natural Shi-tsu would have. Still keep Her noise in the open.
Even so, do keep Your "man's best friend" in shade, within easy access to a water supply, since all Our long-fur "models" face danger of overheating and sun-strikes.