Were any skin scrapings tested for excessive yeast?
The Orijen & Acana Wild Prairie both have fish/fish product in them but the Lamb & Apple doesn't - fish still sounds like it maybe one cause though
Couple of things to check to start & none of them jump out and look like a potential allergen.......
Each of the last 3 have apples the iams doesn't - any reaction if given raw/cooked apple?
Each of the last 3 have kelp the iams doesn't - any reaction if given powered kelp?
Same with pumpkin - any reaction to pure pumpkin (not the pie filling)?
Same with peas - any reaction if given either raw or cooked peas?
Same with alfalfa - any reaction if given alfalfa?
Same with turnip greens - any reaction if given turnip/turnip greens?
Same with cranberry, juniper berry, blueberry, black currant, raspberry, saskatoon berry - any reaction to anything in the berry family?
Since we're not sure it's not environmental.......
Each of the last 3 have flower/herb that normally wouldn't cause a reaction but if it's actually environmental they might.......
Any reaction when exposed to marigold flowers/plants, chamomile flowers/plant, dandelion flowers/plant,
Avoid biting when a simple growl will do
The Spirit Lives As Long As Someone Who Lives Remembers You - Navaho Saying
Vindication ~ For all those pets who became sick or lost their lives from tainted pet food