I don't have this dog anymore btw,but I was close to it,and I always connect this dog in dreams to symbolise love,loyalty etc,because often in the past I would dream of this dog dying and wake up feeling loss or love lost etc.i don't think it's literally about the dog.
Anyway the dog was cuddling up to me and I noticed it was absolutely covered in fleas and started taking them out.
My dog in real life btw never had fleas.
Anyway what might it symbolise?