A true friend

Given the number of locals who were glued to the TV watching the Westminster Dog Show last week, I wonder if anyone knows the story behind this charming canine statue in front of the Cleaden tombstone at the Wilmington and Brandywine Cemetery?
An online caption says it's a whippet, but a pal who's a dog expert says it's not: "Hair on body and tail too long; chest cavity needs to be deeper in relation to narrower hips." According to the tombstone, the person buried there is James M. Cleaden, who died in 1873 at the age of 48. On the plaque his sister describes him as "an affectionate brother and a true friend." But there's no mention of who the dog is.