Many thanks everyone who replied.
Bindi is fine. I stayed up most of the night keeping an eye on him. I made Ricky take his turn since it was HIS fault this happened.
Bindi is actually being a total brat right now digging at his floor. This is his temper tantrum when he thinks he should be out instead of Olivia.
I did lots of research last night and came to the same conclusion, Roberta. I believe it has to be a pretty big quantity of seeds or eaten regularly over a span of time. People tend to make a big deal out of stuff like this and then it’s scary because of all the hype.
I have a friend on Facebook who messaged me and said the bunnies on his ranch get apples, core, seeds and everything often and are perfectly fine. I messaged him back with the info I had on small traces of cyanide in the apples.
Better safe than sorry. Apple seeds are obviously not good for them, even in small amounts. Sort of like chocolate for dogs. You hear about how toxic chocolate is but I know of a dog who ate a whole chocolate cake and was fine (by accident, of course).
I have no proof he did eat any seeds but I suspect. I found half the core and a couple of seeds on the floor beside the garbage bag. They were very small seeds, though, as it was a small apple.
Will continue to keep a close eye on him today. Thanks again for all your concern. 