I couldn’t help noticing another ingredient that is added to more and more dog foods. It is called CASSIA and in simple terms, it’s a cheap alternative to cinnamon. In dog food cassia works as a gelling agent and preservative. It’s more likely to be a part of wet food but can be added to kibble also.
Nutritionally, dogs do not need cinnamon or cassia in their diet. While cinnamon can be beneficial for certain conditions when used in very small quantities and short period of time, cassia may cause or worsen liver disease, increase risk of allergies, skin inflammation and irritate digestive tract.
It can become toxic if used for a long period even if the amount it minute. It is approved in EU & a few other countries but as far as dog food research goes, the studies are still going and latest outcome specifies that only purified cassia can be used and in certain amounts (just over 1% of total food) . Considering that not enough research has been done and possibility of side-effects however minor, do check labels of your dog food just to be on a safe side. Cassia can be listed as cassia gum or E427 or E499.