Paris – A French artist who hatched nine eggs after sitting on them for three weeks has been condemned by an animals rights group for depriving the chicks of a mother.

Abraham Poincheval hardly slept in the 23 days he spent nesting inside a glass vitrine in a Paris art museum which he finally left Thursday after all but two of the eggs hatched.

Last month the man dubbed France’s most extreme artist made headlines worldwide after spending a week entombed inside an egg-shaped rock at the Palais de Tokyo.

But animal rights group PETA said they took a dim view of the birth of the chicks, the first of which emerged on Tuesday.

“There is nothing to celebrate in the birth of this chick born alone in a museum,” the organisation said in an open letter to the artist. “Considered merely as a part of an ‘artistic’ performance, it will never meet its mother. “Animals have no place in art,” it added.

© AFP STEPHANE DE SAKUTIN French artist Abraham Poincheval (C) sits on chicken eggs during a performance at the Palais de Tokyo on March 29, 2017 in Paris

© AFP STEPHANE DE SAKUTIN – French artist Abraham Poincheval (C) sits on chicken eggs during a performance at the Palais de Tokyo on March 29, 2017 in Paris