Isn't one of the all time questions "Where did we come from?" The Lord asks where were you when I laid the foundation of the earth or the cornerstone of it? Job 38: 4 -7 "When the morning stars (daughters of God) sang together and the sons of God shouted for joy?" Because the earth is the place created for the learning and progression of the children of God, where all would take place. We are spirits who came to be born into bodies (a glory). Everything was spirit in heaven before it was placed in the earth. Every plant and herb was in heaven as spirit before it grew on earth. Gen. 2: 5 We were there, before Adam and Eve were placed here, their body created from the elements of the earth and then birth there after in the likeness of our Father…in Heaven. The spirit and the body together is the living soul. "The body without our spirit is dead." James 2: 26 We are spirit which is a finer body in the same image of our bodies, and likeness of our family in heaven who are in the image of God our Father. So that should answer the question will our family pet be in glory with us. Yes. When this earth is worthy for the glory of God, animal life will be here as well. Can you imagine beauty with out them. The Lion will lay down with the lamb. God loves all his creation, even all his children of the earth who seek and follow him and he sorrows over those who do not.