Why does my german pincher leave turds on bedding? Could she be releasing these turds while she is sleeping. We would find turds (walnut size)is this a sign or releasing gas while the dog is sleeping . I can't figure out why she would do this?

Why does my german pincher leave turds on bedding?
A dog does not belong in the bedroom. The bedroom is your (human) nest. A dog has (should have) it's own nest somewhere else. You are pushing the dog into becoming schizophrenic.
And you wonder why she poos in your bedroom ?

Your dog isn't doing this in it's sleep. She is being territorial. When do you feed her? A regular feeding schedule is necessary, and her last meal for the day, should be at dinner time, and she should be taken outside for a decent walk and exersise before bedtime, as well as exercise in the morning, and once again in the afernoon.

There is no reason she can't sleep in your bedroom, but she has to know that you are the pack leader, and this is your domain. Practice giving her a calm yet firm command, whenever she gets into your bed. In other words, let her know that you own it, and will not tolerate her behaviour.

There is no reason she can't sleep in your room, maybe on a pillow or doggie bed, on the floor near you. She has to learn that she is only allowed to come up into your bed when she has been invited to come... not just whenever she wants to. Since you said "WE find turds", this might also be a jealously issue. The two of you need to take a stand, and let her know the rules, in order for her to be a balanced and well mannered pup.

Actually, the dog could be doing this either asleep or awake. It can be an uncommon type of marking behavior called "middening". Does she mark territory anywhere else (urine or feces)? Are you able to get her off the bed without a fuss? If you conclude it is marking, I would make the bed off limits so she understands it is not her territory to claim.
You don't mention how old the dog is--my elderly Dalmatian has started doing this occasionally in her sleep; she seems to be losing some bowel control. We throw an old sheet over the bedspread and wash it if she has an accident. I guess that sounds awful, but she has always slept in the bed, and we don't have the heart to make her sleep somewhere else in her old age.

I had this same problem with my miniature Pinscher. She has slept in the bed with us since we got her at 3mos. Old and is now 10 yrs old. I also have a Chihuahua and the more time went on the more both dogs were peeing and pooing on our floors (carpet) and our bed. After watching "Its The Dog Or Me" on the Annimal Channel with Victoria Stilwell, I realized this was not an occasional "accident" problem as I originally thought, it was a "Dominance" problem. I resolved to settle this issue once and for all by following her advice to make a designated spot on the floor of our bedroom and made sure it was comfy and warm for her and informed my husband to sleep on the couch if he couldn't bear to hear her crying all night because the dog in our bed had to end. Surprisingly she only wimpered and cried for a little bit and scratched on the mattress for me to let her up in the bed a couple of times. I told her to go to her bed and placed her there a couple of times and she slept in "her" bed the rest of the night. Each of the following nights for the rest of the week brought her wimpering to me once or twice in the night and I give her a couple of "Quick" pets and whisper for her to go back to her bed and it worked like a charm. She no longer gets up from her bed at night anymore and sleeps through the night. You can love your pet and be dominant in your own home at the same time, but you have to let them know that you are dominant and their bad behavior is not acceptable. You HAVE to be consistent when breaking the bad habits.

Do you take the dog out before bed? You should always let your pooch release it's waste right before bed and upon rising.

It is possible that your pooch is doing it in its sleep but if he/she is doing it on a regular basis it's unlikely.My dogs would often potty in the house before we developed a potty schedule.