I have 2 issues … one of which was brought to my attention this morning.

I have Audrey, my 8 year old Husky, and Achilles, my new 1 year old Husky.
I’ve had Audrey as my only dog for all 8 years of her life, and she has been Mommy’s ‘spoiled girl’. I had always shot down the idea of getting another dog because she’d been the only one for so long. However, a friend was unable to keep their 1 year old Husky, Achilles, due to a housing situation. I agreed to give him a try and see how it went. Long story short, he’s been at the house for a while now and I’ve grown attached. Audrey stayed at her ‘Daddy’s house’ for about 2 weeks, which left Achilles as the only dog in the house while she was out. She’s been back home for about 4 or 5 days now.

My two issues:

Achilles seems to pace a lot at bedtime. I wonder if it’s a change for him, because he used to be crated at night and while they were at work. I now only crate him while I go to work, and I leave him out the rest of the time. Audrey sleeps on the bed, but last night (as an example) I couldn’t get him to settle down. Since the first day I got him, he immediately goes right under the bed to sleep. He stayed there for just a minute or two last night, then he just paced around the bed, would sit for a minute or so, then pace again until I finally got up and let him out. He went potty, got a little water, then we came back into the bedroom and the cycle repeated. I got tired of the pacing, so I just took him into the living room and let him sleep out there – he had no problems and plopped down and went right to sleep. Thoughts???

My second issue …
Audrey, like I said, has been the only dog for 8 years. She is VERY sweet, easy going, and gentle for the most part. This morning my roommate noticed she was chewing on a decorative pillow that she wasn’t supposed to have (it resembled a toy, in her defense). According to him, he went to get it and she ran to the couch. He said he took it from her, she fought to hold onto it, and then when he finally grabbed it he put it down. He said he went to ‘tap her on the nose’ to let her know that was a no-no and she bit him. I saw the picture – it is a very deep puncture. He said she kept trying to bite him while he held her by the nape of the neck until he was able to push her to the side. This is obviously really startling (and scary) to me because even he said he’s never seen her act like that before. I asked if Achilles was near her and he said no. I’m worried that she is becoming possessive, or that she’s starting to change because he is here … and that is something I swore I wouldn’t do – I wouldn’t keep him if she started to act different.
Sometimes she’s possessive over food, like a lot of dogs are, but she’s never bitten anyone with such aggression in her entire life. I would really like some thoughts or insight. I’m worried … I don’t want this to happen again and I don’t know if him being here is causing her stress or anger.

I think maybe there's some consistency issues? She was the only dog at your home, then he came in and they were together, then she left and went to be a single dog in another home, now she's back with him again... Seems like just a bit of confusion for both of them.

Personally I would ge back to basics with them and start working from scratch. Set rules and boundaries and stick to them. Put them on a schedule and get them back onto a predictable routine. Doesn't really sound like anything other than confused dogs.

The pacing at tonight is probably from stress/change of the living situations. You can incorporate NILIF and do some bonding walks with the 3 of you. Perhaps for some time it may be better to reintroduce the crates. As for the biting... I would advise your roommate to not tap her on the nose or any oth physical punishments. If she's doing something like that and doesn't become possessive of the pillow just take it away, put it up, and remove her from the couch or bed or whoever she has gone. Safest way to do that is with a slip leash.

i second the recommendations placed. You need to bond and let him know that you are all a family. It will just take time.

Best of luck for it, you'll get Achilles and Audrey to being a pack in no time.

We are new to the two dog life as well, so I can't offer too much advice. However, I agree that it sounds like a lot of changes for a dog in a short period of time. Try to get things in order, structured and stable for a couple weeks and see if things settle down some.

When you consider wolf packs, if a packmember dies or a new member joins the whole pack structure changes, so maybe she is just testing her position again.
If you give them some time things will go well I´m sure.

Jack paced every night for the first month after I found him. The consistency is the most important thing. Do what you want to do, but make sure it's the same every night, and ignore their behavior. If you want him to sleep in your bedroom, do so and ignore the pacing. He'll settle down once he's ready to. As for the possessiveness, the best thing I've seen work for that is to practice hand feeding. At least one meal per day, have the dog literally eat out of the palm of your hand, one handful at a time. This let's her know that the food comes from you because you let it, not from a magical bowl on the floor. Short of that, practice give-and-take. Put her food down and pick it back up when she's halfway done. Wait five minutes, then give her the rest. Do the same thing with toys, practice giving something to her and then taking it back in a calm manner. This works for most dogs. Yes, even huskies.

If she keeps up this unusual agressive behavior, maybe have her thyroid level checked. But that's just if she starts acting really weird. Just wanted to throw that out there. My guess is it is the new stress from another dog (which I think can be worked through) and not thyroid, but just in case.

Yup - what everyone else said. And tell your roommate that physically punishing a dog leads to aggression.