pooping during sleep?

Not strange at all and not uncommon -- and I bet, altho I don't know you well at all, I can "predict" that one of your dogs is quite elderly? 

When a dog ages, often the neuro-transmitters that "tell" the brain that there is waste that needs to be expelled or "held" just doesn't work efficiently -- particularly if they sleep deeply and that little turd will just kind of plop out un-noticed.  Often they are completely unaware (and would be very 'embarassed' if they found it) and sometimes you'll see them turn around in the morning as if to say "WHO left ***that*** there!!" and then they sniff and will look around as if to check if they got 'caught' like they're saying "oh my gosh, that's MINE!! HOW did that get *there*!!"

It's not something to scold for - it just plain happens with age usually.  It can also happen to a dog that has back problems -- again, it has to do with that mechanism at the anus that keeps the opening 'shut' until enough has accumulated to indicate to them "gotta go". 

Well, One dog is 2 and one is 3, so i dont think its an age-related problem.  They both appear to be in good health, too.  Thanks for your help, though!

OK, so not age related likely, then it's entirely possible that someone has either a back probem or another health issue.  Callie is dead on right about this and I'd be getting the dogs vetted to find the cause.  This isn't something that should be ignored....it's a sign of a problem of one sort or another.