You really want something more like this: 
package Animal;
use Moo;
has [qw(name gender)] => (is => 'ro');

package Pet;
use Moo::Role;
has [qw(treats pref)] => (is => 'ro');
sub play { sprintf "%s a %s", $_[0]->pref, @{$_[0]->treats}[rand@{$_[0
+]->treats}] }

package Dog;
use Moo; extends 'Animal'; with 'Pet';

package Cat;
use Moo; extends 'Animal'; with 'Pet';

package main;
my @pets = (
    Dog->new( name => 'Odie', gender => 'male', pref => 'chases', trea
+ts => [qw(ball bone doll)] ),
    Cat->new( name => 'Garfield', gender => 'male', pref => 'eats', tr
+eats => [qw(lasagna pookie blanket)] ),
);

printf "%s, being %s, %s.\n", $_->name, $_->gender, $_->play for @pets
+;

[download]

In reply to Re: Package problems by Anonymous Monk
in thread Package problems by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.