Welcome to YT! Sorry your thread got burried and not answered. Since your baby is 5 months old, she may still have some remaining baby teeth which is very common. When you have her spayed in the next couple of months, just have them pull all the rest of her baby teeth and that should help her breath too.
I give my girls dental treats which really helps with their breath and teeth.
Also give her lots of things to chew on so that she can get all those baby teeth out as much as possible.
Again, welcome to YT! You are among friends and there are lots of opinions and information here.
