In 2020, they did a Tox report on Almond milk in the UK, and found the following:
"Eleven drinks containing raw vegetables and fruit, flax seeds, whole apples with seeds, raw almond drink and pasteurised almond drink were analysed for total cyanide. Total cyanide levels of 9.6, 41,134 and 272 g/L were detected in smoothies containing almond drink."
Obviously, as we all know: "Finally, long-term consumption of cyanide-containing foods, such as cassava root or apricot seeds, may lead to cyanide poisoning. [even in humans!]" (https://emedicine.medscape.com/article/814287-overview)
Now, bearing that in mind -- think about how it could build up in your cats system a lot faster than humans, whereas they're relatively mild dosages for humans and it would take drinking a lot of the stuff to poison us, the same is not true for cats. They're a lot smaller.
Well I went with that instead of regular milk due to lactose
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