"Both the cat and the dog like meat."
Translation:Cả mèo và chó đều thích thịt.
This is an idiomatic sentence/expression (see also the tips and notes about conjonctions) meaning not only... but also....
In Vietnamese, you can express it with both following constructions:
Không những (here is những rather meaning only/exclusively)+first subject+mà còn/cũng+second subject+đều (=optional plural particle)+verb
Không những con mèo mà còn/cũng con chó đều thích thịt. [Not only the cat but also the dog (they both/both of them) like meat.]
Cả+two subjects(+đều)+verb/adjective with đều (=all/eighter) beeing very often added as an optional plural particle placed between the subject and the verb:
Cả (con) mèo và (con) chó đều thích thịt. [Both the cat and the dog like meat.]
With more than two subjects, with or without classifier depending on how general is your statement, say for example:
Mèo, chim và chó đều thích thịt. [Cats, birds and dogs, all like meat.]
If you just want to point out both of them, use two subjects and cả hai:
Con mèo và con chó, cả hai đều thích thịt. [The cat and the dog, both of them like meat.] [Both, the cat and the dog, like meat.]
Cả hai đều thích thịt. [They both like meat.]
And of course you can say cả ba(=all three), cả bốn(=all four), etc
I'm no expert, English is not my mothertongue. And I only see the option (in English) with the single subjects, not those with the generic plural, so I don't know if the determiner is mandatory in the translation or not (it shouldn't). It is just one more acceptable answer.
To me this reads, Both the cat and the dog both like meat. Cả and đèu are both "both" aren't they? In English you would not use both twice in the sentence. Wouldn't, Cả mèo và chó thích thịt hoặc Con mèo và con chó đều thích thịt, be the correct sentence structure? 2 x both in the one sentence seems odd to me.
So, after various discussions and research, I think I understand. Cả is more "All of the (following) / the whole set / each of the (following)." It refers to a specific group/set/whole of known entities. Which is why con (in the sense of the) isn't used and would be reduplicative/redundant as it's already wrapped into cả.
So, a more literal translation of "Cả mèo và chó đều thích thịt" something like "Each of the (Cả) cat and dog evenly/equally (đều) like meat" which more naturally and correctly yields "Both the cat and the dog like meat."
I think for the general statement "Both cats and dogs like meat" you'd just drop the "Cả"