For some breed strains, both the hens and roosters develop spurs from a young age. In that case, the owners are normally aware of this and spurs on both sexes are expected. It's a little-known fact about chickens, but hens of any breed can grow spurs.
Can a hen grow spurs?
According to the site, hens can develop spurs. Sometimes they grow no further than tiny bumps and other times,they will grow actual spurs. They will never grow to the size of their male counterparts, but they are believed to be a very old genetic trait that expresses itself in some breeds of chickens.
How often do hens have spurs?
As a general answer, chickens can have fully grown spurs anywhere between the ages of 3-9 months. What is this? Typically, it's mostly roosters that grow spurs. Both roosters and hens will develop spur bumps within weeks, for most hens it stops there.