Should I wake my healthy 4 month old baby for feedings during the night?

No. Generally, once an infant starts to sleep through the night (around 2 months) it is not necessary to wake the baby up to feed him/her, assuming the baby feeds well during the day, is wetting several diapers a day, appears healthy, and is growing well. It is important not to interrupt a healthy baby's sleep/wake cycle.
Feeding a baby. No. You want to train this child to sleep through the night and to get on a good and reasonable feeding schedule. Let them sleep and get some rest yourself.