I guess dogs are more popular than cats, no?

I have neither.

I have no pets.

I have 4 cats, 1 dog, and 4 rats.

I have no pets

But I'm thinking of getting a formicarium.

Isn't swine an uncountable noun?apparently you are correct. I didn't know that. Well, at least the thread is good for something.

Two cats and four goldfish.

2 cats.

I've had dogs before, but I'm really a cat person.

there are more dog owners but there are more cats (cat owners tend to have multiple).

4 cats at my house.

I have two younger brothers.

Hur hur hur