الطبيب البيطري هنا.

In Arabic, the present-tense to be is usually not written or spoken in simple sentences like this.

So:

• الطبيب البيطري هنا
• literally: the veterinarian here
• natural English: The veterinarian is here

This kind of sentence is very common in Arabic. The idea of is is understood automatically.

If you wanted the past, Arabic would use a verb, for example كان for was.

It is the noun phrase meaning the veterinarian.

It has:

• الطبيب = the doctor
• البيطري = the veterinary / veterinarian-related

Together, they mean the veterinary doctor, which is the normal Arabic way to say veterinarian.

So البيطري is describing الطبيب.

Here it is an adjective, not an iḍāfa.

Why?

Because in Arabic, an adjective usually matches the noun in definiteness. Since الطبيب is definite, the adjective is also definite:

• الطبيب البيطري = the veterinary doctor / the veterinarian

If it were an iḍāfa, the second word would normally not take ال in this way.

So this is:

• noun: الطبيب
• adjective: البيطري

Because Arabic adjectives agree with the nouns they describe in definiteness.

So if the noun is definite:

• الطبيب = the doctor

then the adjective must also be definite:

• البيطري = the veterinary

That gives:

• الطبيب البيطري

This is different from English, where only the appears once.

In الطبيب, the ل of الـ is not pronounced normally, because ط is a sun letter.

So the pronunciation is closer to:

• aṭ-ṭabīb

not:

• al-ṭabīb

By contrast, in البيطري, the ب is a moon letter, so the ل is pronounced:

• al-bayṭarī

So the full phrase is pronounced approximately:

• aṭ-ṭabīb al-bayṭarī hunā

Because it is describing a definite noun.

Compare:

• طبيب بيطري = a veterinarian / a veterinary doctor
• الطبيب البيطري = the veterinarian / the veterinary doctor

In Arabic, adjectives match the noun in:

• definiteness
• gender
• number
• case

So once the noun has الـ, the adjective also takes الـ.

هنا means here.

It functions as an adverb of place, showing location.

So the structure is:

• الطبيب البيطري = the veterinarian
• هنا = here

Together:

• The veterinarian is here

هنا does not need الـ, and it does not change form here.

In fully vocalized formal Arabic, it would typically be:

• الطَّبِيبُ البَيْطَرِيُّ هُنَا

More precisely:

• الطبيبُ = nominative
• البيطريُّ = nominative, because it is an adjective matching الطبيب
• هنا = indeclinable adverb

Why nominative? Because this is a nominal sentence, and الطبيب البيطري is the subject-like part of the sentence.

In everyday writing, these case endings are usually omitted.

Yes. Literally, it is something like the veterinary doctor is here.

But in natural usage, that usually corresponds to the veterinarian is here.

So:

• literal sense: the veterinary doctor
• natural English meaning: the veterinarian

Yes. Arabic can change word order for emphasis.

The basic neutral sentence is:

• الطبيب البيطري هنا = The veterinarian is here

But you could also say:

• هنا الطبيب البيطري

This can sound like:

• Here is the veterinarian
• or it can emphasize the location

The original version is a straightforward, neutral way to say it.

You would make both the noun and the adjective feminine:

• الطبيبة البيطرية هنا

That means:

• The female veterinarian is here

Breakdown:

• الطبيبة = the female doctor
• البيطرية = veterinary, feminine form

Again, the adjective must match the noun.

The indefinite version is:

• طبيب بيطري هنا

This means:

• A veterinarian is here

Here:

• طبيب is indefinite
• بيطري is also indefinite, to match it

So compare:

• طبيب بيطري هنا = A veterinarian is here
• الطبيب البيطري هنا = The veterinarian is here

It can be used with other words too. بيطري means something like veterinary or related to animal medicine.

For example:

• مستشفى بيطري = veterinary hospital
• عيادة بيطرية = veterinary clinic
• طب بيطري = veterinary medicine

So in this sentence, البيطري is simply the adjective that tells you what kind of doctor it is.