Plz go through the detail. Dog in?

During a 16days observation period of street dog I have noticed this thing 1. He was not drooling 2. Ate dry pedigree  dog food one day by chewing. Ate egg.. May be also drunk water can't remember. Other day may he had other  source of food. As he was roaming in locality. 3.never bite any one 4. Society is full of small children and they are love to playing on street and that suspected dog was love to watch their play while sitting near. 5.that dog  had a buddy dog both of them love to play together... 6. While sleeping on street I went near to him he tilt his head wag tail then sleep again 7. He was going to sniff a old dog and that old dog lighty bite his front face . Then the suspected dog rub his nose with his front leg. but didn't bite the old dog in return. 8. No one is bitten by him in society nor he had paralytic symptom . Now according to WHO and CDC can we refer that dog a healthy dog in regarding 10days( in my case 16 days) observation? the dog died any day btwn 23-33