That or Deus Ex Machina decided to kill them off the bat.
At this point i wouldn't be surprised if the will of the earth, the universe, god, etc. would kill off yukkuris in the spot ala "you there, you die now because i feel like it" even without any proper reason like rain, blunt objects smacking them, poison, etc. They just die since yukkuris had reached "that" point of death rate.
Ah, they died with such happy expressions.Yuuun!! Yuuun!!Do you wike it?Myu <3Yuuun! So happy! <3Here, Mwommie, a pwejent! <3Myu <3 Myu<3Yuu <3Myu <3Shweet-shweets! <3DELICIOUS sweet-sweets