If you can get your fingers to them, you should feel something like a thin woody stick attached to the casings. It is not something you would expect an octopus to be able to make and the eggs casings are quite firmly attached (at least until they deteriorate).
As I remember, Leggs acted similarly and would eat and be out some after her false brood but was not as interactive as before. I seem to recall she lived quite a bit longer and CaptFish was never quite sure if she actually laid eggs. Dave?
She was out on the glass last night and took two pieces of clam from my hand, but this morning, it looked like she had only eaten one of them. I put a black mollie in the tank to entice her with it's shimmying. Lol!
Avoid all fish store fish. If the store does not treat them with copper, the wholesaler does. If you can find some brackish water (I have tried Sailfins from Paul Sachs) animals that are from the collector and can inquire about copper use, there is no harm in feeding fish on occassion but, when I give an odd live animal, I perfer crawfish over fish.