Broad Paws

       "type" : "mutation",
       "id" : "PAWS_LARGE",
       "name" : "Broad Paws",
       "points" : -3,
       "visibility" : 4,
       "ugliness" : 3,
       "mixed_effect" : true,
       "description" : "Your paws are much larger now.  Manual dexterity is is difficult: permanent hand encumbrance of 2, serious problems crafting, and no gloves.  But you can swim more effectively.",
       "prereqs" : ["PAWS"],
       "cancels" : ["TALONS", "ARM_TENTACLES", "ARM_TENTACLES_4", "ARM_TENTACLES_8"],
       "category" : ["MUTCAT_BEAST", "MUTCAT_URSINE"]