Concerning Pets in Heaven

Concerning pets in heaven:
Mindful comes closest to my thoughts on the subject. Pets are not in heaven for the sake of their own souls (which do not exist, probably), but for the complete happiness of their human. Is heaven filled with the souls of feral animals? Why would that be the case? However, where does that leave the wild rabbit in my backyard, for which I built a protective brush pile and put out vegetables. We would stare at each other with appreciation (and maybe two-way fondness), but no further relationship. We played an fairly important part in each other's lives. But, does it get the rabbit into heaven?