Nice to have the numbers, I used to feed her a bear or a Boar everyday for the first few weeks (or a Gator Beast depending what I had, I'd always give her the biggest thing in my inventory).Yeah, her "Affection" is how well-fed she is by the MC. And the higher her "Affection" the more eggs she lays. Steaks are okay but bears are x2 "Affection" bump from a steak, boars x1.5. But IIRC only the first thing you give her on a day counts (just like giving gifts to other girls). And, she loses a bit of "Affection" each day. If you only feed her a steak once a week she gets back to zero before the next one...
Five days with a bear each followed by a boar on day six will max out her "Affection." After that one boar a week the day before egg-laying keeps her topped up. But if you go a while without feeding her you'll have to build it back up again.
So do you know if mike__wazouski's problem is the frugal steak? can you get eggs if thats all you are giving her?