Mischiefs not included in Art. 328 are punished according to the
value of the damage caused.

      Ex. scattering human excrement in public building, killing
          of cow as an act of revenge, A servant who released bird
          from cage as act of hate against owner

If the amount involved cannot be estimated, the penalty of arresto
menor of fine not exceeding P200 is fixed by law.

People v Dumlao, 38 OG 3715:
When several persons scattered coconut remnants which contained
human excrement on the stairs and floor of the municipal building,
including its interior, the crime committed is malicious mischief
under Art. 329.