कुत्ता उल्टी कर रहा है और उसे भूख नहीं है।

कुत्ता is the direct singular form of dog. Here it is the subject of the sentence, so the direct form is used.

• कुत्ता = a dog / the dog
• कुत्ते can be:
  • plural direct: dogs
  • singular oblique: used before certain postpositions

Since there is no postposition attached to कुत्ता, and the subject is singular, कुत्ता is correct here.

उल्टी means vomit or vomiting. In Hindi, this idea is very often expressed with उल्टी करना, literally to do vomiting, which is the normal way to say to vomit.

So:

• उल्टी = vomit / vomiting
• उल्टी करना = to vomit

This is a very common Hindi pattern: a noun combines with करना to make a verb-like expression.

Hindi often uses a noun + करना structure where English would use a simple verb.

Examples:

• सवाल करना = to ask a question
• कोशिश करना = to try
• उल्टी करना = to vomit

So उल्टी कर रहा है literally looks like is doing vomiting, but idiomatically it just means is vomiting.

This is completely natural Hindi.

Because रहा / रही / रहे agrees with the subject, not with उल्टी.

In कुत्ता उल्टी कर रहा है:

• the subject is कुत्ता = masculine singular
• so the progressive form is कर रहा है

Here उल्टी is part of the expression उल्टी करना. It is not what controls the gender of रहा.

Compare:

• कुत्ता उल्टी कर रहा है = The dog is vomiting.
• कुतिया उल्टी कर रही है = The female dog is vomiting.

So if the subject changes to feminine, then रहा changes to रही.

कर रहा है is the present progressive form, meaning is doing.

It is built from:

• कर = from करना
• रहा = progressive marker
• है = is

So:

• कर रहा है = is doing
• in this sentence, with उल्टी, it means is vomiting

This is the normal way to express an action happening right now.

Because Hindi usually expresses feelings and bodily states like hunger, thirst, pain, etc. with an indirect-style construction.

Instead of saying something like he is hungry, Hindi says something closer to:

• to him, hunger is not

So:

• वह = he/she/it (subject form)
• उसे = to him / to her / to it

That is why उसे भूख नहीं है is used, not वह भूख नहीं है.

Common similar patterns:

• उसे भूख है = He/She/It is hungry.
• उसे प्यास है = He/She/It is thirsty.
• उसे दर्द है = He/She/It is in pain.

Yes. उसे and उसको are both possible here.

• उसे = shorter, very common
• उसको = also common, sometimes slightly more explicit or emphatic depending on context

So both are natural:

• उसे भूख नहीं है
• उसको भूख नहीं है

In everyday speech, learners will hear both.

Hindi normally uses the noun भूख meaning hunger, not an adjective equivalent to English hungry in this structure.

So the idea is:

• उसे भूख है = literally to him/her/it, hunger exists
• natural English: he/she/it is hungry

And with negation:

• उसे भूख नहीं है = he/she/it is not hungry

This is one of those places where Hindi and English organize the sentence differently.

In Hindi, नहीं usually comes before the verb or auxiliary that it negates.

So:

• भूख है = is hungry
• भूख नहीं है = is not hungry

The same pattern appears in many sentences:

• वह नहीं आता = He does not come.
• मैं नहीं जानता = I do not know.
• यह अच्छा नहीं है = This is not good.

So नहीं before है is exactly what you should expect.

It can mean any of those, depending on context.

Hindi third-person pronouns do not work exactly like English he/she/it. The form उसे can refer to:

• him
• her
• it
• that person
• that animal

Here, since the sentence starts with कुत्ता, we understand that उसे refers back to the dog.

So in English it would often be understood as it, but grammatically Hindi is not making the same kind of distinction English does.

Hindi often repeats the reference with a pronoun when moving into a new clause, especially after और.

So:

• कुत्ता उल्टी कर रहा है और उसे भूख नहीं है।

This is very natural and clear:

• first clause: the dog is vomiting
• second clause: the dog has no appetite / is not hungry

Could context sometimes allow omission? Yes, but using उसे makes the sentence clearer and more natural in many situations.

और means and.

It joins the two clauses:

• कुत्ता उल्टी कर रहा है
• उसे भूख नहीं है

So the whole sentence links two related facts:

1. the dog is vomiting
2. the dog is not hungry

This is the standard coordinating word for and in Hindi.

Not always. Grammatically, कुत्ता is masculine singular, and it can refer to:

• a male dog
• a dog in a general sense, if sex is not important

If you specifically mean a female dog, Hindi would usually use कुतिया.

So:

• कुत्ता उल्टी कर रहा है = the dog is vomiting / the male dog is vomiting
• कुतिया उल्टी कर रही है = the female dog is vomiting

In many contexts, कुत्ता can function as the default general word.

Yes. A few natural alternatives are possible, depending on style and emphasis.

For example:

• कुत्ता उल्टी कर रहा है और उसको भूख नहीं है।
• कुत्ते को भूख नहीं है और वह उल्टी कर रहा है।

These mean essentially the same thing, though the focus changes slightly.

One small note:

• कुत्ते को भूख नहीं है uses कुत्ते because को requires the oblique form
• that is why it changes from कुत्ता to कुत्ते

So this is a useful contrast:

• कुत्ता उल्टी कर रहा है
• कुत्ते को भूख नहीं है

It contains both a progressive idea and a present-state idea:

• उल्टी कर रहा है = present progressive, is vomiting
• भूख नहीं है = present state, is not hungry

So the sentence mixes:

• an action happening now
• a condition or state that exists now

That is very normal in Hindi, just as it is in English.