FILE - In this Oct. 19, 2011 file photo, dogs bark as a hooded youth gets into position to throw a bottle filled with paint as he is sprayed by a police water cannon in Santiago, Chile. Free-roaming dogs number in the millions in Chile, creating a situation the nation's Humane Society calls alarming. (AP Photo/Aliosha Marquez, File)

Associated Press
FILE - In this Oct. 19, 2011 file photo, dogs bark as a hooded youth gets into position to throw a bottle filled with paint as he is sprayed by a police water cannon in Santiago, Chile. Free-roaming dogs number in the millions in Chile, creating a situation the nation's Humane Society calls alarming. (AP Photo/Aliosha Marquez, File)
FILE - In this Oct. 19, 2011 file photo, dogs bark as a hooded youth gets into position to throw a bottle filled with paint as he is sprayed by a police water cannon in Santiago, Chile. Free-roaming dogs number in the millions in Chile, creating a situation the nation's Humane Society calls alarming. (AP Photo/Aliosha Marquez, File)
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