Is my barred rock rumpless or a late bloomer?

[sourland]

It will be interesting to hear what your check finds. The bird looks rumpless to me, and yes it can occur in any breeds.

 

[aart]

Does 'rumpless' mean it has no tail bones?

 

[Trish1974]

Does 'rumpless' mean it has no tail bones?

Yes, it is the absence of tail feathers, the tail bones up to the back of the hip bones, and the oil gland. It is dominant over the tail gene.

 

[Trish1974]

Here's a good visual:

 

[aart]

Yes, it is the absence of tail feathers, the tail bones up to the back of the hip bones, and the oil gland. It is dominant over the tail gene.

Great, thanks @Trish1974 !!
Does lack of oil gland cause problems with plumage?

 

[Trish1974]

Does lack of oil gland cause problems with plumage?

Not that I have seen or heard of...though I don't know how it couldn't.