
The smitter |

I think that it works, the feat as written in the Bestiary says you have to have a +4 att bonus and a Natural Attack, so I believe that it would work,
However it is a monster feat not a Player feat and I am not sure it it would be allowed and You only have a natural Attack when you drink you Mutagen. But I don't think either stop you from taking the feat provided that you GM says it ok,