Yes. I felt bad at first, but then I realized I was just being silly. A deer is a deer and dead is dead. What does its size matter? If I was set on taking a deer when I was out, and I saw a doe with two fawns, I would take one of the fawns instead of the doe in a heartbeat. Most people would do the opposite.
Now, enjoy the best-tasting venison you will ever eat (a fawn), and don't feel bad about something that, in the end, is pretty superficial. If those fawns were alone, then they may have lost their mother. Could have been a very, very hard winter for the one you took without mom.