The tree the dog alerted or showed interest on was not on the Morphew's Puma Path property, it was on another property in Monarch River Estates. On this lot map, it is Lot #4 and is the portion of that lot that has the building envelope drawn on it (situated across Monarch River Estates Drive from Lot #3).
https://www.monarchriverestates.org/file/document/881338593/1HjSZll4mBNKzlnA.pdf
How convenient to bury something under a soon-to-be-poured house foundation.