We brought home out first foster this week (an 8 y/o female labby picked up as a stray), an everything has gone relatively well. I picked up that she can be a bit possessive about toys/food/attention, she's a pretty jealous girl. The rottie that lives here just pretty much stays out of everyone's way but my 1 y/o male lab mix and her are having some issues.

First off was just a "this is my food dish not yours" squabble. Nigel tries to go in her crate when she was eating. Understandable, undesirable but I get it. Next was when the foster (Maggie) tries to take the rottie's (Kane) toy. Generally NEVER a good idea with that dog. He will not bite, but if you know rotties and how they growl it doesn't sound friendly. Another sqabble. This evening, the Maggie is laying on the floor in my room and my dog (Nigel) comes up the stairs to go to bed. Nigel walks around her to get to his crate and granted my back was turned so I don't know who provoked it, but another mini-fight.

Each instance there has been no biting, just on the hind legs, teeth baring, snarling. Nevertheless, not good.

This is our first foster and I hate to send her on her way, but I'm sure there is a way that I can structure my movements to set a heiracy to this household.

Any ideas about bringing in possesive dogs to a household?

The quick answer is to remove any items that she might feel possessive about.

When it comes to her possibly guarding you from the other dogs (or the space around you) don't allow it. Growl at her to let her know her behavior is not acceptable. Remove her from the situation by putting her in her crate or outside for a few minutes.

I have a new foster dog who is terrified of everything. She was lying by my feet yesterday when another dog approached. She started to go after the other dog, so I said NO firmly and put her in her crate for 30 minutes. Now she's much more relaxed around the others and lets them get near me.

Please give her some time to adjust.

Many shelter dogs are very stressed...you may not know what kind of past she has had...:(

Oh heck, I post something and forget it's here.

Thanks for the suggestions and concern. Miss Maggie May has been quite good. She is quite smart and learns from one correction to curb her behavior (except for licking, but honestly...that's not too important). There was one more squabble (Nigel stepped on her head when she was sleeping), and I honestly think it is her intolerance for puppy behavior/antics. She puts them in their place and backs away.

She's actually so wonderful that she got adopted, she leaves on Sunday. I know that this is a good thing, but she is my first foster and of course I got attached. She's going to a good home on the Mississippi river with a woman who goes hiking and camping (she's an angel off leash) every weekend. We'll see how the next one is!

I wanted to add a bit of advice for your next foster. I'm not sure how quickly you introduced Maggie to your pack at home, but I always lean on the side of caution when introducing an older foster into my home. Adult dogs are usually already set in there ways, whether they are strays and independent or come from homes that never disciplined or properly socialized the dog. I RARELY give free roam of the house within the first few nights.
It usually takes around two weeks or so to get a feel for the dog around my other animals (I have a cat and two birds, so this is where much of my caution is focused) but they need to earn my respect and their freedom in my home. The cannot come in and claim everything, that is a big no-no. Just a suggestion for your future fosters. :)
Glad Maggie is being adopted, that is wonderful news!