By Agence France-Presse
The father, who can "neither read, nor write, nor count, doesn't realise the seriousness of the situation and spent all his welfare money on alcohol," Carole Papon, a representative of the association French Victims 87, said Wednesday.
Within a few days of welfare payments being made "the family had nothing to eat. They only had Coca-Cola to drink," she said.
The father, who was described as violent towards his wife and children, was jailed for three months Wednesday in Limoges, central France.
The eldest boy had to have seven sugar-rotten teeth removed, and the second does not speak. Both have been taken into care where they have been introduced to meat and vegetables.
"There was nothing in their flat," Bruno Robinet, the deputy public prosecutor, told AFP.
"There was no fridge, the children slept on a mattress without covers and there were no toys... Their father fed them on cakes and coke," he added.