UK Barred Rocks often seem to lack the distinctive yellow legs. I also seems to me that Barred Rocks in the UK have a different Standard and the birds there look tall and lanky to American eyes. Different country, different blood lines
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As you can see with these Frank Reese, ringlets, the yellow comes later and may also come in later in that UK bird as well.
Thank you Fred, for the clarification. I have seem a lot of BR chicks over here with pink legs. My chick's legs have developed a slight yellow hue in the short time I have had her, so fingers crossed.