s ▁than ▁pure ▁wol ves , ▁and ▁have ▁greater ▁end urance ▁when ▁ch asing ▁pre y . ▁High ▁w olf - content ▁w olf d ogs ▁typically ▁have ▁longer ▁can ine ▁teeth ▁than ▁dogs ▁of ▁compar able ▁size , ▁with ▁some ▁officers ▁in ▁the ▁South ▁African ▁Def ence ▁Force ▁comment ing ▁that ▁the ▁animals ▁are ▁capable ▁of ▁bit ing ▁through ▁the ▁t ough est ▁padding ▁" like ▁a ▁kn ife ▁through ▁but ter ". ▁Their ▁sense ▁of ▁sm ell ▁apparently ▁riv als ▁that ▁of ▁most ▁established ▁sc enth ounds . ▁ ▁Test s ▁undert aken ▁in ▁the ▁Perm ▁Institute ▁of ▁Inter ior ▁Forces ▁in ▁Russia ▁demonstrated ▁that ▁high ▁w olf - content ▁w olf d ogs ▁took ▁ 1 5 – 2 0 ▁seconds ▁to ▁track ▁down ▁a ▁target ▁in ▁training ▁sessions , ▁whereas ▁ordinary ▁police ▁dogs ▁took ▁three ▁to ▁four ▁minutes . ▁The ▁scientific ▁evidence ▁to ▁support ▁the ▁claims ▁by ▁w olf dog ▁research ers ▁is ▁minimal , ▁and ▁more ▁research ▁has ▁been ▁called ▁for . ▁ ▁Health ▁ ▁Wolf d ogs ▁are ▁generally ▁said ▁to ▁be ▁naturally ▁health y ▁animals , ▁and ▁are ▁affected ▁by ▁fewer ▁inherited ▁dise ases ▁than ▁most ▁bre eds ▁of ▁dog . ▁Wolf d ogs ▁are ▁usually ▁health ier ▁than ▁either ▁parent ▁due ▁to ▁heter osis . ▁Some ▁of ▁the ▁established ▁bre eds ▁of ▁w olf dog ▁that ▁exist ▁today ▁were ▁b red ▁specifically ▁to ▁improve ▁the ▁health ▁and ▁vig or ▁of ▁working ▁dogs . ▁ ▁There ▁is ▁some ▁controvers y ▁over ▁the ▁effect iveness ▁of ▁the