Someone's got to say it: be careful about doing this globally, as there could be occasions when you want a single letter word to remain on the first line.
Arguably in your example, “piggy and I” belong together as the subject of the verb, and the text would read better that way.
For another example, “King Henry V” might be better not to be split over two lines (could be achieved with a non-breaking space).
Other languages might yield some exceptions. Russian and Polish certainly have single-letter prepositions, which obviously work better at the start of a line than at the end. In Italian, a, e, i, o, è are all single letter words (to, and, the, or, is). Tried to find a resource with general multi-lingual guidance, but no such luck.
And just to confuse things further, Hart's Rules for Compositors and Readers (Oxford University Press, 1967) has plenty of instances of single letter words at the ends of lines, and has no “rules” to cover this eventuality.