i borrowed a friends pet rabbit for 2 weeks and koda was kept on lead whilst bunny was allowed to hop about close to him .slightest pull toward rabbit was corrected with a "leave it & stop whistle" i can honestly say i could shoot rabbits all day & he would retrieve them all ,i allow him to flush them but he would NOT kill one your dog may be a bit young but further down the line this might be of interest to you mate -good luck! -billy