There isn't much more you can say, the best thing is to just be there for them and let them know you are there. When I lost my little Summer there wasn't anything anyone could, I had the same type of relationship with her as your brother did. It has been 4 months since I lost her and I am still grieving and it is soo hard. Time will ease the pain for them. One thing I found very comforting to me was to read stories about rainbow bridge, and other stories that help with pet greif. The day after Summer's death I went on the internet and read and read stuff like that. It helped me
. RIP little Molly Marie.