My four months old Maltese went to the vet yesterday to have his cherry
eye surgery. Today I found a flea on him! I immdeiately showered him
and killed that little evil. I also checked to make sure there isn't
anymore. (that's relatively easy since he is white and his hair cut
short) What can I do to make sure no more will show up later on? Is
there any medication I can give him go make sure any eggs, if any,
won't hatch?

Please help!