I purchased her for a final bid of around $21 (It was in the UK, but this was also before Ebay.co.uk began and there were no sales in anything other than US dollars. At the time, I assumed she was just a variation sold in other countries, as we were discovering still variants in pose and in colouring at the time. But as the years passed, it became clear that she was something else.

A Baby Susie in this pose does appear in the promotional Hasbro catalogue for 1993 (unfortunately I do not have permission to include the scans here). Whether this pony is the one photographed or not is not clear - personally I am doubtful, but I do think that it gives a clue as to her origin. She is not a prototype in the sense of something unfinished, but she is a perfectly produced pony down to symbol and hair and everything. She is almost identical to my childhood Baby Susie except for the pose - her eyes are a slightly bolder pink but that is basically all.
My theories are that she is either:

a: A promotional baby made for toy fair promotion purposes. This means there were probably a handful made for each country, but she is the only currently known survivor.

b: A sample product when Hasbro were determining which pose to use for which pony. It is possible they made samples in both this pose and the Ember pose before deciding to go with the Ember pose.

Either way, her exact origins are mysterious. All that can be said for sure is that she was found, sold and bought in the UK some time around the turn of the milennium.

She has been to several pony meets and conventions and has been fully authenticated by many other collectors. She is also not the only example of an alternate posed baby from this set - you can find out more about the other on Baby Billie's page.

Best Friends Baby Backcard