The full answer
Zabiha is an intentional act of slaughter.
Among the concerns with automated poultry slaughter are whether each individual bird receives the required cut and whether Allah's name is properly pronounced for each individual slaughter.
An automated blade processing thousands of birds is not treated by HMS as equivalent to individual hand Zabiha.
Answers in the Halal Knowledge Center reflect the standards followed by Halal Monitoring Services (HMS), which operates as part of the Shariah Board of America. HMS certifies only what it checks.