Barplot with grouping x axis and count data

 Hello,
 I am trying to make a barplot with nested count data which is build like
 this: first there are several birds (n)laying 3 clutches composed of 2 eggs
 half of the second and third clutch received treatment and this treatment
 was tested to influence sex of offspring. I want a barplot showing counts
 for male and female for every egg of every clutch. can someone tell me what
 to do? I drew a table of how i wanted it to look with:
 ftable(sex,clutch,egg,treat) giving:

 clutch   egg   treat    #females #males
 1          1        0            14       21
                      1           5         2
            2        0            25       24
                     1            3         43
 2          1        0            23       43
                     1            23       5
            2       0            43        6
                     1            54        1
 3 etc

 I would want to have clutch egg and treat all on the xaxis but not in
 separate bars but nested within eachother just like the table. Can someone
 tell me how to deal with this problem?

 thank you,
 Linda