I believe garvo stated in the original post as they were advertised as "green tag"  cattle, but not preconditioned, therefore they really weren't green tagged.  From the ICA:

Calves that have been green/gold-tagged but not weaned for at least 30/45 days may be sold, but they are NOT PRECONDITIONED and must not be represented as such. The preconditioning certificate is not provided to the owner until 30/45 days after weaning