Three of mine are also rehomes.
Joey: His former owner had to rehome him. Won't go into details, but it really wasn't an easy decision, actually, the decision was made for him by someone else. I honestly hope to NEVER be in that situation. I actually didn't think Joey would still be available because the add I saw for him was so old, but his former owner really wanted to find him the best possible home and I'm flattered he thought I would be it.
Petey: Aggression issues are her downfall. Not sure why they are there though. All I know is that one of her owners brought her in a pet store for a wing/nail clip and he told the clerk who was handling her to keep her because she bit too much and walked out...the clerk did keep her for a while but then Petey started attacking his new significant other and he chose to find her a better home. She ended up in the rescue ran by some of my friends and then ended up with me.
Zuri: Former owner died of cancer. Pretty sure he did not know he had it when he got her but probably got diagnosed not too long after getting her. Also ended up in the same rescue as Petey.