The wolf will live with the lamb, the leopard will lie down with the goat, the calf and the lion and the yearling together; and a little child will lead them (Isaiah 11:6).
This may not be the most essential question, but it is a tough one. Pets are a part of the family, so losing one can be painful. If someone hopes to see their beloved pet again in heaven, I don’t want to squash their hope. Here are some thoughts from Scripture:
When God created the world, the creation of humans was unique from that of the animals. We are created in God’s image (Genesis 1:26–27). Humanity has a unique destiny. Jesus entered history as a human being, God’s message of salvation and eternal life is given to humans. At death, we reach complete holiness (2 Corinthians 7:1) and await the restoration of our bodies at the day of the Lord. When that day comes, we will reflect the image of our God with perfection. Animals are not described in the Bible as having unique thinking abilities that allow them have a personal relationship with God. Consider Psalm 32:9: “Do not be like the horse or the mule, which have no understanding but must be controlled by bit and bridle or they will not come to you.” Still, I believe there will be animals will be in heaven:
The wolf will live with the lamb,
the leopard will lie down with the goat,
the calf and the lion and the yearling[a] together;
and a little child will lead them.
The cow will feed with the bear,
their young will lie down together,
and the lion will eat straw like the ox.
The infant will play near the cobra’s den,
and the young child will put its hand into the viper’s nest.
They will neither harm nor destroy
on all my holy mountain,
for the earth will be filled with the knowledge of the Lord as the waters cover the sea. (Isaiah 11:6-9.
It would be strange to use animals to illustrate future peace, even though animals will not be around in the end. It looks to me like animals are going to be around.
What about pets in heaven? We can only speculate. Heaven is a place where God intends for humanity to be fully happy: “He will wipe every tear from their eyes. There will be no more death or mourning or crying or pain” (Revelation 21:4). If a pet is essential for humanity’s happiness, I suspect pets will be there. That’s what I might say to a child who is devastated over their dog being hit by a car. Here’s a question worth asking, that isn’t just about pets in heaven: Does anything have such an important place in our hearts that we can’t be eternally happy without it?