Leap!

'A flea asleep / in the deep green moss / nettled by midges / wakes up cross, / starts to fidget / and turn and toss.' Then his 'lever-legs twitch' and he LEAPS into the path of a grasshopper.

Which so startles the grasshopper that, she, in turn, LEAPS onto a bunny. And so it goes, dog, fish, bullfrog, horse and dog again, each leaping and upsetting the next.

Until the dog finds herself in that same deep green moss.

The flea sees his chance and leaps onto the dog. And, at last, they both fall asleep!