-Weruva has Xanthan & Locust Gums also Potato starch. ( all 3 of my cats vomited from it.)
Carob (Locust) gum – Locust bean gum (LBG, also known as carob gum, carob bean gum, carobin, E410) is a galactomannan vegetable gum extracted from the seeds of the carob tree, mostly found in the Mediterranean region. It consists chiefly of high-molecular-weight hydrocolloidal polysaccharides; LBG is used as thickening agent in pet food.
Why – First, it’s a complex sugar which is not good for cats. Second, it is very close in structure to cassia gum. See cassia gum for more information.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cassia gum – A food additive made from the endosperm of Senna obtusifolia (also called Cassia obtusifolia or Cassia tora). It is a polysaccharide used as a thickener and gelling agent in pet food, and has E-number E499.
Why – First, it’s a complex sugar which is not good for cats. Second, there have been biological studies done on Cassia gum effects on cats, dogs, and rats in 1980’s for FDA, where kittens that were administered high dose (2.5% of daily nutrition) and kittens that were administered moderate dose(0.75% of daily nutrition) of cassia gum per day all died after 2-3 weeks; Their mothers and fathers were given cassia gum before and throughout pregnancy period. There was also a decrease in appetite and changes in digestive processing due to the fact that cassia gum absorbs much of moisture inside the digestive tract. Another interesting thing is that in the group where higher dosage was administered there were a lot more still born births and neonatal deaths.
http://luvbritishkatz.weebly.com/cat-food.html