Like Pat said hospice is the BEST.
I went through what you are facing with my wife in August. One thing, if your dad is pretty tough like my wife was, he won't tell you how bad he is hurting. I finally realized what terrible pain my wife was in a little too late. We could have made her much more comfortable had she said something. When we found out, we upped her morphine to the "no pain" level, the sky is the limit with hospice, you just have to be aware and ask. My wife slept peacefully until the end after we upped her meds.