Poso pinso a la menjadora i alimento la mascota.

Catalan often drops the subject pronoun when it is clear from the verb ending.

• Poso already means I put
• Alimento already means I feed

So jo is not necessary. You could say Jo poso pinso... if you want emphasis, contrast, or extra clarity, but in normal speech it is usually omitted.

Poso comes from the verb posar, meaning to put, to place, or sometimes to set.

In this sentence:

• poso = I put

This is just the normal 1st person singular present tense form.

A useful thing to notice: posar is a very common everyday verb in Catalan.

Here, pinso is being used as a mass noun, like food in English.

So Poso pinso... means something like:

• I put pet food/feed...

without focusing on a specific unit or portion.

If you used el pinso, it would usually sound more like the pet food, referring to a specific known food. Both can be possible, but pinso without an article is very natural when talking generally about putting food in a feeder or bowl.

Pinso is specifically animal feed or pet food, often the prepared food you buy for animals.

By contrast:

• menjar = food in a general sense, or to eat as a verb
• pinso = feed/pet food

So if you are talking about feeding an animal, pinso is more specific and natural than menjar in many contexts.

Menjadora means a feeder, feeding bowl, or container where an animal eats from.

It is related to menjar meaning to eat.

Be careful not to confuse it with:

• menjador = dining room

So:

• menjadora = animal feeder / food bowl
• menjador = dining room

That difference is very important.

After posar, Catalan commonly uses a to show the destination of something:

• posar alguna cosa a algun lloc = to put something somewhere

So Poso pinso a la menjadora is a natural way to say that the food is being placed in the feeder.

Also note:

• a + la stays a la
• only a + el contracts to al

So a la menjadora is exactly what you would expect.

Because alimento is the verb form, while aliment is a noun.

• alimentar = to feed
• alimento = I feed
• aliment = food / nourishment / nutrient

So in this sentence, you need the verb form:

• alimento la mascota = I feed the pet

This follows the normal pattern for many -ar verbs in the present tense:

• parlo = I speak
• treballo = I work
• alimento = I feed

Because in standard Catalan, a direct object usually does not take the personal a, even if it is a person or animal.

So standard Catalan prefers:

• alimento la mascota
• veig la Maria

This is different from Spanish, where you often get:

• alimento a la mascota
• veo a María

For English speakers who also know Spanish, this is a very common thing to notice.

They are closely related, but not exactly identical.

• Poso pinso a la menjadora describes the action of putting the food into the feeder
• Alimento la mascota describes the broader action of feeding the pet

In real life, those actions happen together, so the sentence sounds natural. But grammatically they are two separate actions connected by i.

Because the same subject continues across both verbs.

The structure is:

• [I] put feed in the feeder and [I] feed the pet

Catalan, like English, does not need to repeat the subject when it is the same and the verbs are linked by i.

So this is perfectly natural:

• Poso pinso a la menjadora i alimento la mascota.

If you repeated jo, it would usually add emphasis:

• Jo poso pinso a la menjadora i jo alimento la mascota.

That sounds much less neutral.

Yes. There are several natural alternatives, depending on the nuance you want.

For example:

• Dono menjar a la mascota = I give food to the pet
• Dono pinso a la mascota = I give pet food to the pet
• Poso pinso al bol de la mascota = I put pet food in the pet’s bowl

Compared with these:

• alimentar can sound a little more formal or general
• donar menjar sounds very everyday and conversational

So the original sentence is correct, but it is not the only possible way to express the idea.

Not completely. Catalan word order is fairly flexible, although the original version is natural.

You could also say:

• Alimento la mascota i poso pinso a la menjadora.

That changes the order of the actions, but the grammar is still fine.

The original version is straightforward and clear, especially if you want to describe the physical action first and the general result second.