Seeing 3-4 spikes a year is not uncommon on my place but I've seen over a dozen this year and seeing the same on the big ranch. Buddy has a place nth of town and he's reporting the same thing. We've had a mild green summer with plenty of rain.
Seven years ago we where in a drought, we now have a very healthy 4 and 5 year old doe herd. Older healthy does (mild winters and decent summer rains) means more twins more fawn recruitment