It is easy to tell the the 2 Spirit pups apart but every now and then Dennis or Nathan mixes up the Tempie pups with the Spirit boy. LOL
Both siblings are mighty agile. They have bonded with the rest of the pups as they sleep together. Instead of relying on each other as they did at 1st as it was only those 2, they have branched out their relationships as I suspected they would. They will be forever more thought of as the litters of 17.