
I can sympathise with you as our JRT, Pip, has had colitis and it's horrible for them isn't it.
What the vet gave Pip was tinned chicken and rice (Royal Canin) and then the second time she started off with that but then was put onto Eukanuba canned fish and potato. She took a bit of convincing with the fish and potato (added white fish in) but soon got the hang of it and really enjoyed it.
We're just at the moment feeding her with Arden Grange's sensitive food which is white fish and potato but in dry form - it's especially for dogs who have very sensitive tums / colitis etc and comes highly recommended by others with dogs with problems like Pip's. There seems to be a lot of food available to help with these conditions - when I enquired on here I was told Wafcol Salmon & Potato is very good.
Can't help re Burns I'm afraid as I'm nowhere near knowledgeable enough; but thought I'd pass on what I've found out!
Good luck with Floyd and hope you can get it sorted.