Digging up a fresh controversy, Andhra Pradesh Chief Minister N Chandrababu Naidu on Wednesday slammed the previous YSRCP government over alleged usage of substandard ingredients and animal fat in the 'laddu' served as 'prasadam' at the revered Sri Venkateswara temple in Tirupati, which is run by the Tirumala Tirupati Devasthanams (TTD).