Gården har mange dyr.

The ending -en is the definite article attached to the noun. In Norwegian, instead of putting a separate word like the before the noun, you often add the article to the end.

• gård = farm
• gården = the farm

So gården means the farm.

Because Norwegian usually puts definiteness on the noun itself.

English:

• the farm

Norwegian:

• gården

This is very common in Norwegian. The article is usually a suffix:

• en bil = a car
• bilen = the car
• et hus = a house
• huset = the house

So gården already includes the meaning of the.

The word order is the normal Norwegian subject–verb–object pattern:

• Gården = subject
• har = verb
• mange dyr = object

So it is built like:

The farm + has + many animals

This is the same basic order English uses in a simple statement.

No. In Norwegian, verbs usually do not change for person the way they do in English.

So you get:

• jeg har = I have
• du har = you have
• han har = he has
• vi har = we have

The verb stays har for all subjects in the present tense. That makes Norwegian easier than English in this area.

After a quantity word like mange meaning many, Norwegian normally uses the indefinite plural noun.

So:

• mange dyr = many animals

That is the normal pattern.

Using a definite form after mange is generally not what you want in a basic sentence like this. You are talking about a number of animals, not the animals as a specific known group.

Compare:

• gården har mange dyr = the farm has many animals
• dyrene = the animals

Because dyr is one of those Norwegian nouns whose indefinite singular and indefinite plural look the same.

• et dyr = an animal
• flere dyr = several animals
• mange dyr = many animals

This is completely normal. Norwegian has quite a few nouns like this.

If you want the definite plural, then it changes:

• dyrene = the animals

Dyr is a neuter noun.

Its forms are:

• et dyr = an animal
• dyret = the animal
• dyr = animals
• dyrene = the animals

It matters because the singular indefinite article is et, not en. But in this sentence, you do not see the article because the noun is plural after mange.

The difference is indefinite versus definite:

• gård = farm / a farm
• gården = the farm

So if you are talking about a specific farm already known from the context, gården is the right form.

A rough guide for an English speaker:

• gården: the å is a deep vowel, somewhat like the vowel in British born or more, though not exactly the same. The g is pronounced, and the word stress is on the first syllable: GÅR-den.
• dyr: the y is a front rounded vowel that English does not really have. To try it, say ee with your tongue in that position, but round your lips as if saying oo.

These sounds can take practice, especially å and y.

Yes, in some contexts gård can have related meanings such as farm, estate, or in some compounds even something like yard/courtyard. But in a simple sentence like Gården har mange dyr, farm is the natural meaning.

That is because having many animals strongly suggests a farm.

Because mange is a quantity word that does not change here. It works with plural nouns regardless of grammatical gender.

Examples:

• mange dyr = many animals
• mange biler = many cars
• mange hus = many houses

So you do not need to match it to masculine, feminine, or neuter in this kind of phrase.

Yes, but it means something slightly different.

• Gården har mange dyr = The farm has many animals
  This refers to a specific farm.

• En gård har mange dyr = A farm has many animals
  This sounds more general or introduces a farm for the first time.

So both are grammatical, but the choice depends on whether you mean a farm or the farm.