I have a bigger yorkie, Trixie is around 13 lbs. she has seizures on occasion also. My youngest yorkie, Jewel is about half her size, but when Trixie has a seizure Jewel goes crazy on her and just attacks her and that also gets our other female, Mia to get in on it and start biting Trixie. Jewel will also try to attack Trixie when we pick her up, and we have been bitten just for holding Trixie. So we never leave Jewel and Trixie alone together, ever, Jewel is put in another room and we never pick Trixie up when Jewel is right there. It's not a problem other than that though and Jewel is good with people and my grandkids, but I would be interested in hearing some good advice on dogs that can be aggressive in that situation.
Just a thought, but if you have other dogs and you take this one, she may still be a problem. I had to rehome one a couple of years ago as she couldn't get along with any of my females. My friend took her as he had no other dogs.