Thanks everyone.
Jenna continues to eat her fish and improve. Vet wants to keep her to just the cod for awhile and see how she fares. She does continue to have a dry cough that can end in a bit if a gag, but we figure it's strain or burns to her throat from the propulsive vomiting she did last week. We're making sure to keep an eye on her for signs of aspiration pneumonia though.
I'm hoping by this time next week we may be able to add a bit of mashed potato to her food or some carrot. She's done so well so far, we want her diet to be better balanced this go around.
Still going with ulcer or GERD for the diagnosis, complicated with protein allergy. Stress is a big factor and we need to get hers reduced.
Eliminating any and all possible environmental allergens as well, perhaps everything just came together at the right moment for a disaster.
Oddly enough, her breath, which has always been horrible, is improving on this diet also. Who knew? :-/ She'll be up for a good tooth cleaning anyway, once she's back to top form.
Thanks again for thinking of her.