Ok, I hope somebody knows this. There was a movie I seen in the nineties, something about mice or some kind of rodents in a tree or a burrow and the got smoked out or gassed out and there was a white screech owl that was after them only at night. The rodents were afraid of people and one of the rodents didn't make it out when they gassed them and they got her out afterwards, but she was sick or something. So they crushed up something and gave it to her to make her better.. anybody? LOL

It could be The Secret of NIMH or Once upon a forest.
I think someone else asked the same question . Check here:https://www.askmehelpdesk.com/movies/looking-late-80s-early-90s-cartoon-childrens-movie-13363.html