Stunning current frequency was also
investigated. Male broilers were stunned (DC;
50% duty cycle; 40V; 25mA/ bird) using current
frequencies of 50 to 1000 Hertz (HZ). While
the incidence of bruising with electrical
stunning varied, it was lowest with the 50 HZ
and increased to around 25% with the higher
levels, while the incidence for the control
group, processed without electrical stunning,
was 13.3%. Birds assessed post-picking had a
33.2% incidence of drumstick bruising while
birds assessed post-chill had a 18.6%
incidence. Around 6% of the post-chill bruises
were not evident at post-pick