What connects horses, cattle, asses, mules, sheep, pigs, goats and dogs (and no others)? (Of course, it's not 4 feet)

Animals listed in the Bible also include camels, which were clearly domesticated at the time. Some texts give one mention of cat, but that is often considered as a transcription error, and a number of sources state that it is an interesting fact that cats are not mentioned in the Bible.

https://en.wikipedia.org/wiki/List_of_the_animals_in_the_Bible

The Protection of Animals Act 1911:

"For the purposes of this section, the expression ‘animal’ means any horse, mule, ass, bull, sheep, goat, dog or pig."

http://www.irishstatutebook.ie/eli/1911/act/27/section/15/enacted/en/html

Protection of domestic and captive critters.

https://www.cps.gov.uk/legal-guidance/offences-involving-domestic-and-captive-animals

Nope. Not protection. Funnily enough, both GN and I knew this one already. They're the only animals (apart from humans) that you have to report to the police that you've hit and killed on the road in the UK. You can just leave the elephant where it lies, but you have to notify the demise of the chihuahua.... All else counts as wild, even the Pedigree Persian.