Thank you ladyjane

I think my old vet (who was excellent btw but she went back to university and is unavailable) recommended UC Davis and it's vets. I am encouraged.
I'm online now doing more research...found some stinky poop on Halo so have canceled that order.

Really when it comes down to brass tacks, I'd much rather cook for her...I was vegan in my early twenties and may need to get back to it myself.
gemy, thank you for your input also. Yeah, I found that I had to cut back her "midnight snack" habit we'd gotten into and although I still get the big liquid eyes, she will eventually settle down after a drink of water or two and go to sleep. I really had to cut back her portions during the day though too because I found her stomach getting worse when there was more food being eaten. I literally count her kibbles into her bowl.
ETA: Just heard back from my vet, he is now convinced it is the kibble that's the problem....(no fooling!) and he is speaking to a nutritionist on staff (didn't know we had one, he said something about how she orders the food for the practice though so...cautiously optimistic) about a homecooked diet for Jenna. He'll call me back when he has something for her.
He did say he was afraid to try anything even like Royal Canin for fear of making her worse. (Glad I cancelled the Halo!) There was talk of maybe trying her on meat again but he wants to get this home-cook vegan diet first. He is also going to re-up her amoxicillin so she can at least be spared the colitis while eating the DVPNB. Another 2 weeks of antibiotics...poor thing is going to have no gut flora left!
As long as this food doesn't do any damage to her internal organs (and there wasn't any evidence of it so far) then we'll take care of her symptoms, but I am so stoked that we may finally be getting somewhere and maybe drop this product at last that has been so questionable.
Okay...for the moment I can be a happy bunny