package Beef;

use vars qw(@ISA);    #if you use strict
@ISA  = qw(Cow);
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To be technical, Beef IS NOT a Cow - a Cow HAS Beef. Take a look into aggregation for alternatives to inheritance.

Jeff

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
F--F--F--F--F--F--F--F--
(the triplet paradiddle)