I don't think a foot drop will hurt, especially if it's on to soft substrate. When my lot are in the mood they galumph and thud about like elephants ...royals really are thick. (In every sense lol.) Sweet, but thick ...
They can bruise themselves and this can cause early sheds but a foot shouldn't cause any serious injury though I don't have anything raised for Duke to climb on because he is just likely to fall.
Phew! This is my first night owning a Royal, and i was beginning to get a little concerned by his clumsiness. He makes a much louder thud than Shorty ever did lol
I've thought I was been burgled one night with all these loud thuds about a minute apart, I went to investigate and saw Duke wrapped round his light guard I went to look out the window to see if it was outside and thud Duke was on the floor, noise located.