▁sheep gro wer , ▁Frederick ▁York ▁Wol se ley . ▁His ▁machines ▁made ▁in ▁B irmingham , ▁England , ▁by ▁his ▁business ▁The ▁Wol se ley ▁She ep ▁She aring ▁Machine ▁Company ▁were ▁introduced ▁after ▁ 1 8 8 8 , ▁reducing ▁second ▁cut s ▁and ▁she aring ▁time . ▁By ▁ 1 9 1 5 ▁most ▁large ▁sheep ▁station ▁sh eds ▁in ▁Australia ▁had ▁installed ▁machines , ▁driven ▁by ▁steam ▁or ▁later ▁by ▁internal ▁comb ust ion ▁engines . ▁ ▁She aring ▁tables ▁were ▁invent ed ▁in ▁the ▁ 1 9 5 0 s ▁and ▁have ▁not ▁proved ▁popular , ▁although ▁some ▁are ▁still ▁used ▁for ▁cr utch ing . ▁ ▁In ▁the ▁US , ▁the ▁world wide ▁short age ▁of ▁she ar ers ▁is ▁becoming ▁a ▁consideration ▁for ▁those ▁wanting ▁to ▁expand ▁w ool ▁production . ▁With ▁sheep ▁numbers ▁decl ining ▁in ▁that ▁country ▁the ▁profession ▁sees ▁significantly ▁less ▁interest ▁in ▁becoming ▁a ▁qualified ▁she ar er . ▁ ▁Import ing ▁labour ▁during ▁the ▁Australian ▁off - season ▁has ▁also ▁become ▁problem atic ▁because ▁of ▁del ays ▁in ▁obtain ing ▁work ▁vis a ▁and ▁because ▁she ar ers ▁numbers ▁are ▁limited ▁world wide . ▁ ▁Modern ▁she aring ▁ ▁Today ▁large ▁f lock s ▁of ▁sheep ▁are ▁must ered , ▁ins pected ▁and ▁possibly ▁treated ▁for ▁par as ites ▁such ▁as ▁l ice ▁before ▁she aring ▁can ▁start . ▁then ▁sh orn ▁by ▁professional ▁she aring ▁teams ▁working ▁eight - hour ▁days , ▁most ▁often ▁in ▁spring , ▁by ▁machine ▁she