- For Teachers
At first the tiger cub, who was named Timothy by Grandfather, was brought up entirely on milk given to him in a feeding-bottle by our cook, Mahmoud. But the milk proved too rich for him, and he was put on a diet of raw mutton and cod liver oil, to be followed later by a more tempting diet of pigeons and rabbits
Please explain the highlighted group of words.
Having been fed on raw mutton and cod liver oil [for two months], he was subsequently fed on pigeons and rabbits.