how do I output multiple files with a heading for each one but without needing to page through them?

I am running a file search command with ag -g foo and I'd like to see the contents of the files I find. If I do ag -g foo | xargs more then the more command makes me press the spacebar to advance between each file, even though they are small enough that I could see more than one at a time in my terminal window. If I do ag -g foo | xargs cat then I see everything at once, but the files are mushed together so it's hard to see where a new file starts. Is there a way to see the files all in one scroll, but with a heading for each one?