This April 25,2013 photo provided by SpayFirst shows wild dogs near Valentine, Neb. Veterinarians are going to inject 300 wild female dogs with a birth control vaccine that has worked on white-tailed ... more 
This April 25,2013 photo provided by SpayFirst shows wild dogs near Valentine, Neb. Veterinarians are going to inject 300 wild female dogs with a birth control vaccine that has worked on white-tailed deer, feral horses, wallabies and ferrets. The two-year study on the vaccine GonaCon will be conducted on two poor, isolated Indian reservations in the Pacific Northwest. The dogs are community-owned and get scraps from people who don't want to see them die, even though the litters keep coming. (AP Photo/SpayFirst/Ruth Steinberger) less 
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Associated Press | Photo By SpayFirst/Ruth Steinberger
Thu, Jun 20, 2013 4:37 AM EDT