...most of the cat and dog biscuits contain 14% ash amongst other crud, no way I would even try them.
'Ash' in the context of 'nutritional information' on pet food has a specific meaning LOL It refers to the mineral content (of vitamin and mineral fame). The term 'ash' comes from the way labs test for the mineral content itself. A weighed sample is incinerated in a machine at a set temperature. The food burns off but the denser minerals don't - so the remaining 'ash' is the minerals... Hence 'ash content'
That said you were still correct; dog and cat 'food' (using the term loosely) is absolute crud and very bad for their health. My dogs only get fresh species-appropriate food. That is, whole raw meaty bones and carcases (rabbits, hares, pheasants, chickens, fish etc). If you're feeding the right sort of meaty bones, your house shouldn't stink at all - they should be completely edible inside 5 to 10 minutes. In other words, not the huge round "marrow" weight bearing bones like cow legs.