Activists are concerned that dogs at the Chinese enclave's track are killed once their racing days are over
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The howling of the dogs can be heard behind the high concrete walls topped with barbed wire that circle the Canidrome in Macau. This run-down track near the former Portuguese colony's border with China is the only greyhound track in Asia, and is targeted by animal activists, who accuse its owners of brutality and of killing dogs after their racing days end.

Some greyhound tracks run active rehoming programmes, but discussions about one at the Canidrome have broken down because of a lack of trust, according to the Macau animal rights group, Anima.

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full story:
http://www.guardian.co.uk/world/2012/apr/05/macau-canidrome-greyhounds