Sizing of a pet not the same when in studio vs game (WeldConstraint?)

Hey so i have a pet that works fine, but the sizing is weird in game. Do i need to use weld constraint or something, i want it to have a fix size (2,2,2) whatever the player"s character is.

In studio ;
Capture d’écran 2021-12-18 à 09.27.55

In game;
Capture d’écran 2021-12-18 à 09.27.39

Explorer ;

Capture d’écran 2021-12-18 à 09.27.07