I am a little confused, who is Heidi, is that the schnauzer??
It sounds like your Sadie has dominance aggression. She goes after those who she knows she can control. Heidi being submissive and Lillie being a puppy makes them easy to dominate and perfect targets.
I would suggest taking her to a trainer so that they can observe Sadie and how she reacts that way they can figure out the best way to correct it.
This will be a harder thing to overcome and will take alot of time to correct it, but it can be done. |