Our Losing Shorty Dog

This has been such a long time in writing, but we have had so much going on here lately.  We lost our Shorty dog a couple of months ago. He HAD been doing so well, but one day, he just kept having seizures and he went to bed, and the next morning, he had passed in his sleep. My husband and I were totally devastated.  Our Bella is doing well, although she misses Shorty so much. We had lost our Abbey dog about a month before Shorty so we have had a lot of loss. However, my hubs is now starting to want a companion for Bella, but I don't know if I am ready or not.  How will I know when it's time?