There were about 2 weeks with nothing but Oxbox hay and fresh water. No changes, no pellets or treats or anything else, and there were no changes in her poop.
Here is the full time line, though:
Feb 19 - Brought Pearl home
Feb 28 - Brought Diamond home. Both were eating Kaytee pellets and Kaytee hay. Pearl's poop was always good, Diamond's poop was always a little sticky and soft. They each had 1 raisin twice the first week.
March 16 - Diamond had bad diarrhea, smeared poop EVERYWHERE. There was nothing obvious that changed here. Diamond had only had 2 raisins the first week, no treats after that, so the week leading up to this was no changes - same food, hay, and water.
March 17 - Went to the vet, fecal test came back clean. I was told to separate them, and give Diamond nothing but hay and water. I switched to Oxbow hay. Diamond had a few hours of perfect poop, then back to the same soft, sticky consistency as before, but no smear-y diarrhea. This was the ONLY time she had normal poop, I don't know what the difference was.
March 22 - Put them back together in the cage, Pearl managed to escape from the smaller cage and they were unhappy apart. I started giving Shredded Wheat. Still only hay besides that.
Around March 25 (not sure exactly when) - gave a small amount of Oxbow pellets. I was told to get rid of the Kaytee cold turkey. The next morning, the cage had the smeared poop all over again from Diamond, Pearl was still normal. Immediately removed the pellets. Still gave hay and Shredded Wheat, poop went back to "regular" soft and sticky.
Around April 1 - Stopped giving the Shredded Wheat, it wasn't making a difference.
April 8 - Tried a small amount of Oxbow pellets again, more smeared poop. Took pellets away again.
April 12 - Pearl's poop got soft, and has been soft ever since. The only thing I gave her was a few nibbles of a dipped apple twig from Camphor Chins, it had either rosehip powder or dandelion powder. I only gave it to her once though, she hasn't had it since. I started giving both girls Pet Pectillin per some advice here.
April 14 - Gave both acidophilus in some shredded wheat. Stopped the Pectillin, both had 4 doses total. No difference.
April 15 - Started the metronidazole and put the pellets back in with acidophilus. Someone told me the poop gets worse with the pellets because her stomach needs to adjust, and that it will never adjust if I keep taking it away. They've had pellets with a little acidophilus ever since. The poop hasn't gotten worse, but hasn't gotten better either.
So between April 1 and April 12 (except for the few hours I gave pellets on the 8th) ALL they had was hay and water, and they were together. Nothing else changed. They only went to the vet once, the rest of the conversations were done over the phone.
It seems no matter what I do, her "baseline" that she keeps returning to is soft and sticky. I would love to know what triggered the one blessed morning I woke up to regular poop. I don't know why Pearl's poop changed last week though and hasn't gotten back to normal yet. Her poop was normal ever since we got her.
EDIT - One more thing - I got them both from PetSmart, not from a breeder, so their health and conditions before I got them is unknown.