Perl tends to like its packages defined before they're used. Try putting both your packages inside a BEGIN block. ie 
my $horse1 = Horse->new("George the Horse", 12);
$horse1->present();
$horse1->animalmethod();

BEGIN {
    package Animal;

    ...

    package Horse;

    ...
}

[download]

Update:

I forgot I was going to point you towards Moose. It's a nicer way of writing OO Perl. Then, try MooseX::Declare for a much nicer way.

In reply to Re: Inheritance in Perl5 by FunkyMonk
in thread Inheritance in Perl5 by tamaguchi

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