I need Dawn of mana help please!

In dawn of mana for playstation 2, in the battle arena when you battle, you are able to break open chests, crates, barrels, and flower vases. some times odd foods like bones, hams, and tomatoes pop out of them. oddly, I am unable to obtain such items or eat them into HP (Health or head points). Is this normal? is anyone else experinecing this issue?Thanks in advance!