6 weeks - The stacks aren't very nice, as we skipped training at five weeks and they were extremely hungry today.. But you'll get an idea ;-):

4 weeks:

3 weeks:

3 weeks old, multicrown girl, ridgeless girl 1 and ridgeless girl 2.

10 days old, multicrown girl, ridgeless girl 1 and ridgeless girl 2.

From left -  multicrown girl - ridgeless girl 1 - ridgeless girl 2