As nouns the difference between dog and yogh

is that dog is a mammal, canis lupus familiaris , that has been domesticated for thousands of years, of highly variable appearance due to human breeding while yogh is a letter of the middle english alphabet (capital'' Ȝ''', ''small'' '''ȝ ), in form derived from the old english shape of the letter ''g , and used to represent various palatal and velar sounds.

As a verb dog

is to pursue with the intent to catch.