I was writing something in a scientific context and came across this issue. (I have a feeling that I haven't searched the archive far enough and this might be a duplicate.)
In a sentence like
Whose cat is more beautiful than the cats of their adjacent neighbours?
I would like to use a demonstrative pronoun in place of 'the cats'. Suppose that a neighbour always has a cat.
Is 'those' grammatically correct? I'm not sure because 'those' refers to 'cat', which is singular.
If 'those' is correct, can 'that' be used as well? I'm not sure because it doesn't convey the plurality of cats in the neighbourhood.
If 'that' is not correct, would the use of 'that' in a colloquial context sound strange? (I'm not a native speaker.)