<human>: Can you condense the text into a few key points?

I'll start off by saying, I have a vet appointment today and I'll ask about this when I go.

**Background** - I've had my 8 year-old Boston terrier mix, Lana,  for four years. She is a rescue taken from a hoarder. She went through extensive training with the rescue organization because of resource aggression and fearfulness before I adopted her. In the four years I've had her, she's come a long way as far as becoming more social and outgoing with people. She lived with my husband's dog for two years, and then after he (the dog) died in January, we got a new dog, also a rescue, Penny. They generally get along except in one way - when I'm in the room. Lana has been getting progressively worse about growling and being aggressive towards Penny if Lana is sitting near me and Penny comes in the room. It's especially bad in the bedroom. Lana acts the same way towards my husband, too! We had changed some routines and rewarded her for staying in her bed, and it worked for a while, but she's back to growling at him and lunging at his feet from under the bed.

So, last night, Penny came into our bedroom at 2 am. Lana growled from under the bed, Penny kept on coming and before we could intercept, it was on. Lana ended up with a rip in the end of her ear and knocked two teeth out! Penny has a small puncture wound under her eye.  First thing we're going to do is go back to crating Penny at night. She doesn't pee in the house anymore, so we were trying letting her stay out, but not anymore. I guess I was just hoping someone might have some experience with this possessiveness problem who may have some insight?
<bot>: Possessive (of me) first dog growls at our second dog and attacked her last night in our bedroom causing some legit injury to both dogs.