K.L.
AmyB is right, night shift messes with you and there is never enough sleep. If YOU work days, you sleep nights and the baby probably sleeps better at night than he does during the days. If daddy is working nights, he needs to sleep during the day. Baby is probably awake more in the day and you really cant expect dad to stay awake all day and only nap when baby naps. If grama is so happy to see baby during the day maybe she will be willing to watch baby for a good block of time each day and give dad a chance to set a schedule of sleeping and things will turn around. Or you may have to do like so many others and just get a sitter or put baby in daycare. Even if its part time. Dad HAS to have sleep too. His attitude may be a lot better after a good days sleep.