I don't know if you can find evidence on this, but I believe there will be animals in heaven. I know there will be animals, but I don't know if they will be the same animals we have here on earth, or other just heaven animals. I do believe that God grants His servants anything they wish for in heaven, so if I go to heaven (and I pray that I do ) I will ask God to grant my wish in having my pets there with me, if they are not already there. I hope our pets will be in heaven. And I truely believe they may be there.