#include <sdktools_entinput>
#include <sdktools_functions>
public OnPluginStart() HookEvent("round_start", Event_RoundStart, EventHookMode_PostNoCopy);
public Event_RoundStart(Handle:event, String:name[], bool:dontBroadcast)
{
new entity = MaxClients + 1;
while ((entity = FindEntityByClassname(entity, "chicken")) != -1) AcceptEntityInput(entity, "Kill");
}