@jcboy,
Morgan, I am so sorry that your family has suffered this painful loss. And everyone here, who has experienced a similar loss, understands just how painful it is.
In a way, our grief is a tribute to just how special our dogs are in our lives, and the enormous love they inspire in us toward them. I have never stopped missing the 4 wonderful dogs whose lives I shared over several decades, they were all unique, and wonderful, and irreplaceable.
That said, I still believe that getting another dog, at some future point, does help the healing process because it creates a new loving relationship. Each time I lost a dog, I vowed to never get another and go through this pain of loss again. And, each time I went right ahead and broke that vow, and brought a new pup into my life, something I have never regretted.
It might ease the pain, a tiny bit, for your children, if they made a donation to a no-kill shelter, or animal protection organization, to honor Mackie's memory. It's a symbolic way of helping her memory, and her importance in your lives, to live on.
Again, I am so sorry for your loss.