La vacuna és per a la mascota.

Both nouns are feminine singular, so they take the feminine singular definite article la.

• la vacuna = the vaccine
• la mascota = the pet

Catalan, like Spanish and French, often uses the definite article more regularly than English does. So la mascota is perfectly normal where English might sometimes just say the pet or even omit an article in other contexts.

És is the he/she/it is form of the verb ser = to be.

The accent is important because it distinguishes és from es:

• és = is
• es = a reflexive/pronominal particle, often meaning something like oneself, itself, or part of passive/reflexive constructions

So in this sentence, és must have the accent because it is the verb.

Here per a means for, in the sense of intended for or meant for.

So:

• La vacuna és per a la mascota = The vaccine is for the pet

This is a very common use of per a in standard Catalan when talking about destination, purpose, or intended recipient.

Often, yes in everyday speech, depending on the variety of Catalan. Many speakers say per where standard grammar might prefer per a.

So you may hear:

• La vacuna és per la mascota

However, in careful or standard Catalan, per a is often preferred here because the vaccine is intended for the pet.

A useful learner rule is:

• use per a for intended for / meant for
• expect to hear per a lot in real-life speech

Normally, no. In this sentence, mascota needs an article or some other determiner.

So these are natural:

• per a la mascota = for the pet
• per a una mascota = for a pet
• per a la meva mascota = for my pet

But per a mascota by itself sounds incomplete in standard Catalan, just like for pet would sound incomplete in English.

No, mascota is a noun that is grammatically feminine, but it can refer to a pet of either sex.

So you can say:

• la mascota = the pet

even if the animal is male.

This is grammatical gender, not necessarily biological sex. If you want to specify the animal itself, you might use another noun:

• el gos = the dog
• el gat = the cat
• la gossa = the female dog
• la gata = the female cat

Then the sentence could become:

• La vacuna és per al gos = The vaccine is for the dog

Because this sentence follows a very basic and common Catalan pattern:

• Subject: La vacuna
• Verb: és
• Prepositional phrase: per a la mascota

So the structure is essentially:

• The vaccine
  • is
    • for the pet

Catalan often uses word order similar to English in simple statements, especially with ser.

A rough pronunciation for an English speaker is:

lah vak-OO-nuh ez peh-ruh luh mus-KO-tuh

A few notes:

• vacuna has stress on -cu-
• és sounds like ez or ess depending on accent
• per a is often pronounced smoothly together in natural speech
• mascota has stress on -co-

Pronunciation varies across Catalan-speaking regions, so exact sounds may differ a little.

No, not here.

Catalan has some contractions with articles, for example:

• a + el = al
• de + el = del
• per + el = pel

But with la, there is no contraction:

• per a la mascota stays per a la mascota
• per la mascota also stays separate

If the noun were masculine singular with el, you could get:

• per al gos = for the dog

That is per a + el = per al.

You would usually say:

• La vacuna és per a la meva mascota

Here:

• meva = my for a feminine singular noun
• mascota is feminine singular, so meva agrees with it

You will often see the article kept before the possessive in Catalan:

• la meva mascota = my pet

That article is normal in Catalan.