The English language is very plastic. That means you can bend it and turn it in many ways without changing much--- IF YOU DO IT CAREFULLY. of course there are times when what seems to be a small change will make it very different. This is not one of those times. This is an example of a change that alters... possibly nothing in the meaning.

"feed somebody on something" = to munch on some type of food. Example: Are you going to munch on some chips? "feed something to somebody" = to give food to another person Example: When are you going to feed something to your guests?

We don't use the first one. We can 'feed somebody(without 'on) something' or 'feed something to somebody'. The first means give some food to somebody generally, but it can mean actually put the food in their mouths. The second one means actually put the food in their mouths.