Weruva contains Gums. (most canned food does) I've been reading about why Gums are not good for them. My cats were raised on a Raw meat diet. That's probably why they vomit from the Weruva. Some of their canned food contains all 3 gums!
http://catcentric.org/nutrition-and...-food-products-ingredients-to-avoid/guar-gum/
Carrageenan: is a known cancer-causing substance for humans, it is also known to produce intestinal lesions,ulcerations and tumors in experimental animals
Guar Gum:guar gum’s physiological effects likely have negative repercussions for cats. Guar gum increases gastric emptying time (which may contribute to hairball formation); it stimulates bile secretions (which may contribute to ulcers or pancreatitis); and it slows transit time through the intestines, which negatively affects nutrient availability, specifically impacting protein and fat metabolism.
The effect of guar gum on nutrient availability has been studied in cats. It was added to a standard diet at 0.4% dry matter basis, a higher rate than found in commercial foods and a level that “represents the threshold of guar gum inclusion to avoid production difficulties and textural problems.” (4) Adding guar gum to a standard commercial cat food “had a significant negative effect on apparent protein digestibility in many of the cats and tended to depress apparent fat and energy digestibilities.” (4) Translation? Guar gum inhibits protein AND fat metabolism, and cats need to eat more to compensate for the problem. As the issue was more severe in older cats that naturally have “compromised digestive efficiency,” this is a product to avoid especially in senior or otherwise GI-compromised cats (IBD, IBS, intestinal lymphoma, pancreatitis, etc.). The study also observed that the inclusion of guar gum decreased feces quality, with cats experiencing wet, loose stools and diarrhea.
Xanthan Gum The main risk may be intestinal upset & it may increase the frequency of IBD in your pets.
Supposed to rain today. Good day to work on tiling my bathroom. (I keep putting it off 
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