Zazu sure was used and abused.
Not just talking about Scar's antics like almost getting away with eating him and holding him as a captive Slave.
The way Simba was a brat to him and treating him like sh!t until he was hiding on for dear life on that tree and NOW pleading for Zazus help. Or in "Just can't wait to be king", when he was almost crushed and stomped on by animals 10x his size.