I have had an argument about that with a Christian lady. She claimed that animals don't have souls so they don't go to after life place, say like Heaven. I asked her if animal lovers deserved to go to Heaven. She said yes. I pointed out that it ain't much of heaven for animal lovers if there were no animals. Heaven is like Hell for animal lovers if what she was saying was true. I would like to go to place where I can hang with my cats and dogs. In my religion, You can hang with Sonja again if you choose to do so.
I actually did some research on after life. There were quite bit of reports on pets being there. Those reports are made by folks who were dead for a while and later revived. So you will see her again. Trust me.