Thanks, @Julie Bird - I love them, too. Elf's head is now completely white. Fünf is nearly identical to Elf, but the former has longer legs, and brown feathers over her ears.
Opportunity to share photo's of my Runners
Not in chronological order . . .
Below: Elf, 5 years old. Chocolate Runner
Below: The flock. L-R Romy, Seiben, Einz, Fünf, Sechs, Vier
Below: At three months of age - I can hardly tell them apart, but I am pretty...