Just to clarify, since I don't think my last post
quite does that:
This and
this -- "A Chance of Tomatoes," Season 1 episode 9 (Golias [elephant] sneezes in the first clip from chalk dust, everyone [Golias, Nessa, and Bongo] sneezes in the second clip from pepper)
This -- "Lili Bee," Season 1 episode 20 (Bongo sneezes from fur)
I'm still having trouble locating the last clips, with Nessa (giraffe) fake-sneezing and Golias sneezing from hayfever. The episode doesn't translate to a title that I can search for, but I'm almost through checking Season 1 on Netflix.