4 month appt question--your opinion please.

I went to a new pediatrician (had to change cause of insurance) for my baby's 4 month appt today. I was a bit concerned about his recommendations cause it's the first time I've heard of this. First was to give him a multivitamin with iron because he is breastfed only (for now) until he is on a solid diet. He said they recommend that for ALL babies starting at the newborn stage and beyond, but my last doctor did not recommend that. The second thing was not to feed him at night, or 6 hours, so that he can get used to sleeping through the night. Then feed him as needed throughout day. My baby typically wakes to nurse every 2-2.5 hours then sleeps...which I thought was normal for a breastfed babies? Were these yall's recommendations as well? My sister (mother of 3) didn't think so. Please share your opinions. I'm confused now...