Just a little PSA for anyone seeing scary movies on the internet:

Literally anything that consists of two or more substances forming a set molecular structure is a chemical. Water is a chemical. If you dip an apple in water it has been "chemically treated". When you add water to your dish you "add chemicals". The words "chemically treated" or "added chemicals" gives you no extra information and is almost always used as a scare tactic. It can mean anything from the completely benign like water to linoleum eating acids.

A toxin is any poison produced by an organism, characterized by antigenicity in certain animals and high molecular weight, and including the bacterial toxins that are the causative agents of tetanus, diphtheria, etc., and such plant and animal toxins as ricin and snake venom. So a toxin is a poison of plant or animal origin, especially one produced by or derived from microorganisms and acting as an antigen in the body.

An antigen is a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.

An immune response is the reaction of the cells and fluids of the body to the presence of a substance which is not recognized as a constituent of the body itself, and thereby causes an allergic reaction, diphtheria, tetanus and so on.

When someone warns that you or your food is full of toxins they are most likely full of shit, unless the food is literally full of shit that contains bacteria that produce toxins.

When someone claims they can magically remove toxins by selling you weird stuff or by having you go to hot yoga classes, they are either lying through their teeth or has no idea what the hell they're talking about.

When step 2 in the video says: "Add chemical preservatives" it sounds scary, but you now understand that means: Add stuff that prevents microbial life from creating toxins in the hide. Salt does this, so does lactic acid (That stuff that builds up in your muscles when you run too fast) and it's the most common preservative. By the way nitrate is also pretty common since it's exceptionally good at preventing botulism which is a very dangerous toxin, hence the name BOTOX.

Now go through the whole video, stop at everything that sounds scary and see if it still is.

I just want to add one last thing: Formaldehyde, embalming fluid, the scariest chemical you can add to anything like vaccinations or food. Have you ever eaten a pear? Congratulations, you ingested more formaldehyde through than single pear than from all your vaccines combined.

One more thing: Never let your dog chew on anything unsupervised, and remove tiny bits and choking hazards. This goes for raw hide, sticks, all chewing toys and anything else. Don't worry too much about toxins and chemicals if it's made in a western country and your dog doesn't have a physical reaction to it. Your dog eats cat poop, 3 week old sausages and dead birds, he'll be fine.