Slow down the rate and add water. By doing those 2 things, it will make it easier for your father to tolerate the feedings. Without getting proper nutrtion your father will feel terrible. What is the pump rate currently? What time are his feedings done?

Try starting them out at 40ml per hr. Add 1/2 - 1 can of water per can of formula. Start the feedings at noon and let it run. Make sure he is sitting up and does not lay down immediately afterwards. If necessary, redo this process at bedtime and refill the feeding bag with 2 more cans and 2 more cans of water. It will take forever for it to be absorbed but after a few days then boost the rate to 60. Give that a couple days and move up to 80.

It really is very simple to get your father back to feeling good again. Treatments can really be awful and make you feel miserable. Without getting minimum 498oz water and 2500+ calories per day, your dad will not be able to heal properly and will feel lousy. I also add a scoop of hi protein powder to my formula, protein aids healing.