Quote from : The Mark of Athena Book

You both passed out,” Percy said. “I don’t know why, but Ella told me not to worry about it. She said you were…sharing?” “Sharing,” Ella agreed. She crouched in the stern, preening her wing feathers with her teeth, which didn’t look like a very effective form of personal hygiene. She spit out some red fluff. “Sharing is good. No more blackouts. Biggest American blackout, August 14, 2003. Hazel shared. No more blackouts.” Percy scratched his head. “Yeah…we’ve been having conversations like that all night. I still don’t know what she’s talking about.