Canada, 28 December 2012, The Pig site: A device developed at the University of Guelph has been shown to be as effective but much less unpleasant than alternative methods for euthanizing compromised piglets. Note that according to Directive EU 1099/2009 the use of a non-penetrating captive bolt is not allowed to kill piglets on the farm. Th use of a non- penetrating captive bolt device is restricted to slaughter ruminants, poultry, rabbits and hares, described in ANNEX I:
Art. 4, ANNEX I, table 1, under 2: conditions of use allowed for Ruminants, poultry, rabbits and hares; slaughter only for ruminants; slaughter, depopulation and other situations for poultry, rabbits and hares).
Read more about the Canadian research project: http://www.thepigsite.com/swinenews/31902/zephyr-gun-effective-for-euthanising-piglets