This is the 19th most frequent Catalan word.
seva
"Seva" means "his," "her," "its," or "their" (possessive feminine singular form).
In this context, 'seva' is a possessive adjective meaning 'her' referring to the house belonging to a female.
La seva casa és molt bonica.
Her house is very beautiful.
Here, 'seva' is used as a possessive adjective meaning 'his,' indicating ownership by a male entity.
Ell sempre porta la seva música amb ell.
He always carries his music with him.
In this sentence, 'seva' acts as a possessive adjective equating to 'its,' and refers to the personality unique to each dog.