Question: asking for  a cow showing the lesion  on the leg with the signs of lameness affecting one leg suspected to be pateller luxation 
Answer: told him towash the leg & cleft of hoof  with potash solution &examine the cleft of hoof for any injoury, inject melonex 10 ml - 2.5 ml itra mascularly [ tab melonex -1 tab orally daily for 4 days] , surgical intervention may require if the condition is developedue to the pateller luxation [ pateller dysmotomy may be required ]