Hi need help in finding this movie, I saw it in 1981 on tv it was in color, English what I remember, in the beginning father come home on a horse after  hunting vampire, and his family turn into vampires at the end seen one of the daughters is ready to bite her lover while the whole vampire family are watching from hiding.

there is a seen where a baby that was buried earlier come home in the night crying for his mother from out side cause he is hungry and the mother could not hear him cry, she open the door and breast feed him and get bit by her dead son.