Bug How to fix animation breaking when animation is put onto separate model with same rig?

I have many different models using the same rigs and bones in different positions, and I am trying to have a few animations tied to only a rig be played on these different models. When I import them all to Unity and try to play the animations on the models(in both preview and play), the model is rotated upside down and no animation plays. I am not experienced in playing animations, and don't know what the problem is or how to fix it.