My understanding is that mirtazapine does not help with nausea. People and even vets think that because the mirt makes them eat sometimes despite the nausea, but that's what sets up the food aversion. Cerenia and ondansetron are the anti-nausea drugs that I know have been used for good effect on cats.
If subq fluids are going to be given regularly, most vets seem open to teaching how it's done and selling you the supplies. I have not done it myself, but I have heard it's not difficult to learn. It certainly helps cut down on stressful vet visits. I think you can get the supplies cheaper online.
The latest thinking is that a high fat diet is not linked to pancreatitis in cats although anecdotally a few people do think that certain high fat foods triggered a flare-up. Honestly, unless you strongly suspect that he has an issue with high fat (and unless his symptoms worsened on a/d I wouldn't think so), I would look for a high quality high animal protein / moderate fat / low to no carb food. No grains or starches or fish. No carrageenan is tough to find. Basically, that leaves Nature's Variety Instinct, By Nature organics, some Tiki Cat, Hound & Gatos. This is why so many people decide to go with homemade raw or cooked when looking for specific dietary requirements. It's so hard to find commercial foods that meet all the criteria.
If subq fluids are going to be given regularly, most vets seem open to teaching how it's done and selling you the supplies. I have not done it myself, but I have heard it's not difficult to learn. It certainly helps cut down on stressful vet visits. I think you can get the supplies cheaper online.
The latest thinking is that a high fat diet is not linked to pancreatitis in cats although anecdotally a few people do think that certain high fat foods triggered a flare-up. Honestly, unless you strongly suspect that he has an issue with high fat (and unless his symptoms worsened on a/d I wouldn't think so), I would look for a high quality high animal protein / moderate fat / low to no carb food. No grains or starches or fish. No carrageenan is tough to find. Basically, that leaves Nature's Variety Instinct, By Nature organics, some Tiki Cat, Hound & Gatos. This is why so many people decide to go with homemade raw or cooked when looking for specific dietary requirements. It's so hard to find commercial foods that meet all the criteria.