Don't worry it'll happen in due time. Yesterday I saw two small pups at 600 yards out back of my place, they were about the height of my house cat. I shot at the one and hit his right paw, didn't have enough wind on him. Seen three total yesterday and two day before. Have 5 or 6 living across the road from me and hear them howling most every night. Yesterdays dog was a very small pup and difficult target with the 20 - 25 mph winds and I was trying out some new loads for a 22-250. I'm trying for the 600 to 1000 yard kill, getting closer all the time.
Right now pup distress works great but I ain't calling them yet, too early in the year.