psów

In a sentence

• Nie lubię szczekania psów.

  I don't like the barking of dogs.

  Here, 'psów' is used as the genitive plural form of 'pies' to indicate possession or association.

• Potrzebujemy pomocy przy szkoleniu psów.

  We need help with training the dogs.

  In this case, 'psów' is again in the genitive plural form, showing association with the action of training.

• Nie widziałam żadnych psów na ulicy.

  I didn't see any dogs on the street.

  Here, 'psów' is used as the genitive plural form after a negated verb, which is a standard rule in Polish grammar.