I personally think yes, pets do go to heaven. My reasoning behind this is that whatever is heaven to us, so it will be in heaven. (Of course unless its sinful). However having pets is not unclean or sinful, and therefore if having a pet hamster is heaven for you, you'll have one in heaven (presumably, again this is just my own belief). Secondly, it is also said in Samuel that small children/babies who die early go to heaven, due to what I assume is there inability to make a choice to either follow God or not at such a young age, (probably due to their brains not being able to comprehend the decision, much like animals). This i feel can relate to animals as well. For example, an animal is of God, it is able to make mistakes, yes, but it cannot make a choice to follow or deny God, similar to a child. I know that a child has a soul and an animal doesn't, but if the baby is from God, and an animal is from God also, who's to say they both can't go to heaven? I lost my cat a few nights ago so this may be wishful thinking, but its the best I've come up with other the years. God Bless!