Animals

[Blackion]

When speaking about animals, lets say I have a dog and a cat, how is it right to say: They played with each other?

Or:

It played with each other?

Another question, is a dog is 'he' or 'it'?

[a.k.a.gibsonmpgu]

They played with each other.

is correct.

A male dog (a sire) is "he", a female one (a bitch) is "she". Use "it" if you're not sure about the sex,

[Blackion]

Thanks. Is it goes the same way for all the animals?

[adwise43]

tomcat - pussycat
dog - doggess, she-dog

[Milanya]

doggess, she-dog

bitch

filly - colt (foal)
mare - stallion (horse)
sow - boar (pig)
ewe - ram (sheep)
cow - bull (cattle)

[Blackion]

That is not what I mean. I'm referring to the 'he' - 'she' - 'it' issue.

Example: for birds, rats, cockroaches I should use he/she if the genre is known? And 'it' if the genre is unknown?

[a.k.a.gibsonmpgu]

I'm afraid

genre

has nothing to do with the subject.

[Sergei Troizky]

... for birds, rats, cockroaches I should use he/she if the genre gender is known? And 'it' if the gender is unknown?

Technically, each of these must be referred as "it", especially when the gender is unrecognizable.
However, he/she may be used for beloved pets, or in a case of personification (e.g. in a fiction story).
If a rat or a bird is your beloved pet, call it he or she. But I hardly can imagine this for a cockroach

[Blackion]

1. So when personification is not intended, for what kind of animals I can use he/she?

2. When referring to 'many cockroaches', should I use 'it' or 'they'?

[Sergei Troizky]

He/she may be used for an animal of significant importance for the speaker or in the context.

They is a nominative plural of he, she, and it.
I don't see any reason to refer many cockroaches in singular form.

[Blackion]

In my house there are many cockroaches. They occupy my kitchen every night.

Is it correct?

[Milanya]

In my house there are many cockroaches. They occupy my kitchen every night.

Is it correct?

С точки зрения грамматики - да. (Хотя, конечно, странно это.)

[Blackion]

Спасибо, я как раз про грамматику.

[Serguei65]

In my house, there are many cockroaches. - А вот у меня дома много тараканов.
У меня дома много тараканов. - There are many cockroaches in my house.
Occupy - действительно странно.

[Pinta]

There are a lot of cockroaches in my house.