It is a farmer who discovers one day that one of his chickens is laying only square eggs.
Deciding to exploit this spectacular anomaly, he warns the INRA of his case, which is highly interested, takes the chicken in pension against a good compensation. The problem is that once installed at the INRA, the chicken starts laying eggs oval. Concluded to see the fact, the farmer goes to see his hen and asks him what's wrong. Which one answers to him then:
"Well then ... do you think I'll go on breaking my ass now that I'm a public servant?"