My mare in due to foal in 3 months time. We have a 2yo filly and a yearling from her already and this year she is getting a well deserved break from baby duties!
The 2yo and 1yo have different sires, so they are half sisters - that much I know. The foal due this year is by the son (Royal Blend) of the father (Rotspon) of the 2yo - so what does that make them? Are they still only referred to as half siblings?
