Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Omens
शकुनानि
अन्तर्गृहे गृहेशस्य मरणाय भवेद्भषन् ।यस्य जिघ्रति वामाङ्गं तस्य स्यादर्थसिद्धये ॥ १५ ॥
In the full Agni Purana this is chapter 232, verse 15.
Inside the house, a dog barking brings death to the house owner. Whoever's left side it sniffs, that person gains his aim.
Simple meaning: A dog barking inside the house means death for the owner. Sniffing someone's left side brings his aim.
भयाय दक्षिणं चाङ्गं तथा भुजमदक्षिणम् ।
A dog sniffing the right side or left arm brings fear. One facing the traveler spoils his trip.
मार्गावरोधको मार्गे चौरान्वदति भार्गव ।
A dog blocking the road tells of thieves. A bone, rope or rag in its mouth is bad.
सोपानत्कमुखो धन्यो मांसपूर्णमुखोऽपि च ।
Shoes or meat in a dog's mouth is good. Unlucky things or hair in its mouth are bad.