Lost Pet: SAFARI

Circumstances

He was let out, with another dog, Penelope (black female) to use the bathroom and stretch their legs, while my son and granddaughter went to the store. When they returned and went to let the dogs back in for the night, Safari was not in the backyard and have not been seen since. 

A post was made in the local neighborhood app and walking through the neighborhood and adjoining neighborhoods has not yielded any results.