I used to dream of my pet dog for years after she died and now I have rabbits sometimes I confuse their identities with the dog in dreams.
I've not had one dream about Scratty since she passed in April and, sad as it sounds, I would like to dream about her just to have her back for a bit longer.
From what I've heard about dreams it's probably your subconscious trying to make sense of reality, with it being such a traumatic loss. That however doesn't explain why I don't dream about Scrat 'cause she was my world and her passing was sudden too.
I hope you're dreams improve soon, it must be really hard, in the circumstances.