The sale of rawhide for consumption by dogs should be banned. Rawhide is made from cattle or horse hide soaked in a toxic sodium sulphide to remove the hair and fat. More chemicals are used in order to split the hide into layers which is then washed with hydrogen peroxide to give the white "pure" look and remove the rancid smell.On testing, these chews have shown traces of arsenic, mercury, chromium & formaldehyde, to name a few.,

They are not digestible and swell in the stomach therefore regularly causing intestinal blockages, as well as poisoning from chemical residue and choking. 

The chews go slippery when wet and are near impossible to get hold of to save a choking dog. 

 Soaked in toxic sodium sulphide
Washed in hydrogen peroxide
 May contain traces of arsenic, mercury, chromium and formaldehyde

Potential impacts on dogs:

Intestinal blockages

Chemical poisoning

Choking and suffocation