My puppy is fully potty trained, but still will poop in floor if I leave her alone. She does this even if she has just droped one outside, I think it's separation anexity because she dosen't do it in my presence EVER! How can I stop this stinky problem? I also have two more puppy's and they have mo problem holding it in.

Is there any way to leave her alone outside? If she comes in can she go into a crate/kennel until it's her turn with you? If she has a "safe place" she should feel less anxious.

From experience this is just something that comes with time... My dogs used to scream blue murder when I left the house then eventually they learnt that screaming wasn't going to make 'mummy' come back.

Buy some puppy pads to train her to so she uses them rather than the floor while you are gone.

Have you tried leaving her toys?
Kongs with hidden food inside are great and will keep her entertained for hours, hopefully she won't notice you have even gone :)

Just a thought, maybe it's not total separation anxiety maybe she feels comfortable when your not there to "finish" going. Are you allowing her enough time to complete the stage of her passing the #2 through. Just like humans, without getting too graphic, there are bends and twists lets say, that the poo needs to pass around and then exit, it may not all happen that first squat, give some time to let her complete that stage and let me tell you, I know first hand how crazy it can make you when you need to leave or go back inside the house and the dog keeps going round and round and round and round and... and it's like OMG come on already but low and behold it happens and they finish going. Yeah! If that is not the case and she has the time needed then I would try kenneling when you leave. All my rescue dogs come to me with some sort of separation anxiety and in time if not instantly they love their kennel so much that when they see me getting ready to go out they go in their kennel and wait for me to shut the door. I personally and this is where the debate with people start, I get wayyyy bigger kennels than the size of the dog because I feel they need room to fully stand, turn and move around but some say they will poop and pee in there if it's too big. If any dog is in there too long and hasn't completed their cycle of "going" then they will be more likely to go in there. Also, play some soothing music to keep her calm and distracted from noises. Give her safe toys to also distract her. I could go on with pointers on kenneling but I'm not totally sure you are wanting to kennel so If you are then let me know and I will be more than happy to help. Good Luck