Thanks for the kind words on the preemie she is super fat now.. the ewe put on weight once she got to us. They were all a little on the bedraggled side. I have had them for a year now... and she has got nice body coverage.. the placenta did pass and we burned it. There is no smell to the discharge but there was no more discharge this morning... she is bulging on the one side and when she lies down she is pretty much the same size as the day she gave birth.. I sold the ram once I knew all my ewes were carrying. Not sure if ftp can be bred more than once a year and I think their cycle is 16 days..So sorry, I just found this thread again.
Did she pass the placenta? If you can't find it she may have buried it, so turn the dogs in and they will find it. If she did not pass it you might have a retained placenta. Antibiotics will deal with any infection and she can reabsorb it.
Is there an odor to the discharge? No temperature would seem to negate the idea of infection. Increase in udder size is normal since she is adjusting to the nursing needs of her growing lamb. The increase in body girth is puzzling unless with good nutrition she is putting on the weight she lost before you got her or while carrying the lamb. What does she feel like in body condition when you are feeling her spine and ribs? Is she carrying a layer of fat?
Delayed birth usually takes place within 24 hours since it is usually the result of ovulation and conception in each uterine horn. Once the ewe is pregnant, no more eggs are dropped. Delayed birth is usually from conception in each horn during the same heat cycle. Each separate lambing from each horn produces its own placenta.
If you can get your hand inside her vulva, you might want to glove up, lube up with antibacterial soap, and try to feel inside for an dead lamb. If there is no odor to the discharge, and no temperature, and she is not off her feed or looking really down, it is probably not a dead lamb still inside. However, if you are worried about a retained placenta, you can give her antibiotics. Her vulva is probably pretty tight by now so I wouldn't expect to be able to get more than one or two fingers inside her. If you do go inside be sure to give antibiotics to avoid any infection.
In addition, is the ram running with the ewes? If so he may be trying to breed them. How often do the Persian Fat Tailed sheep lamb? How soon after lambing do PFT sheep come back into season and start cycling again? If he is rough, he may be causing the bleeding discharge although unlikely. My Dorpers produce lambs every 8 months, but normally won't rebreed until their new lambs are 2 months old. If they lose their lamb, they will recycle within a month, rebreed and produce a lamb(s) in 6 months after losing the lambs.
BTW, everything you did for the preemie was spot on! Congrats.