TABLE A.2 List of identified hazards in chickens for each respective killing method.

Hazards	NEFS in containers	Whole house gassing with CO2	CO2 in two phases in containers	CO2 + inert gases in containers	Inert gases in contain‐ners	LAPS	Electrical waterbath	Head‐only electri‐cal stunning	Captive bolt	Percussive blow to the head	Cervical dislocation	Lethal injection
Handling	x		x	x	x	x	x	x	x	x	x	x
Manual restraint	x						x	x	x	x	x	x
Inversion							x	x	x	x	x
Shackling							x
Pre‐stun shocks							x
Loud noise	x	x	x	x	x	x
Substance irritating the mucosa	x	x	x	x	x
Surrounded by foam	x
Jet stream of gas at bird level	x	x	x	x	x
Hurting	x	x	x	x	x	x	x	x	x	x	x	x
Expansion of gases in the body cavity	x					x
Inhalation of the foam	x							x
Too short exposure time	x	x	x	x	x	x	x	x
Too small bubble size	x
Low foam production rate	x
Too low gas concentration	x	x	x
Too low temperature	x	x	x	x	x	x
Inhalation of high CO 2 concentra‐tion		x	x	x
Overloading	x	x	x	x	x	x
Too fast decompres‐sion						x		x
Poor electrical contact							x	x
Inappropriate electrical parameters							x	x
Incorrect shooting position									x
Incorrect captive bolt parameters									x
Incorrect application of the manual method										x	x
Inappropriate route of administration												x
Sublethal dose												x