Due to the new rules for this section, this thread is fair game again. This quote, I am fairly certain, has only been used once in The Land Before Time series.
Hic!
Yes, a LBT character hiccups. It is definately audible, so I know I heard it right, and the character's body even jerks when it happens, so yeah, this quote is the only, to my knowledge, time a LBT character has that infamous involuntary contraction.