Hatch-able eggs, is there a trick?

I’ve had a few hatchables so far, probably about 1/3 of my eggs overall. Keep trying! I’ve read that the more positive relationship your sim has with the chicken, the better chances of getting some neat eggs are.

Make Flirty Treats and feed them to the rooster. This increases the chance of hatchable eggs.

I don't know if you actually have to give it to the rooster or hens, but it seemed more efficient to me to make the rooster randy and only need one treat per coop, instead of a treat for each hen.

If you are lucky you get to see the hearts coming from the coop when he scratches that itch, or at least I did.

I'll try feeding the rooster the treat and see what that does. My sims and my chickens are fairly good friends, I want a golden and an evil chicken, but that's on the back burner until I can get at least hatch-able eggs!

Edit - I make treats (golden, midnight and flirty), and before I'm done there are hearts flying around the coop. I bought 2 more chickens to experiment on, Goldie Money-Pants* (soon to receive the golden treat) and Evilkins Deathlord* (she's having the midnight treat)

*Again, named by my daughter. Evilkins is gonna look a bit funny if the treat doesn't work!

edit 2 - The (hopefully soon to be) Evil Chicken has called down the lightning!
https://i.imgur.com/MVDRt1m.png

The treats worked, although I had to rename them again. Goldie Money-Pants is a golden chicken and she laid my first hatch-able egg (which is incubating now) and Evilkins Deathlord now has fiery evil chicken eyes!

I know it is a little off topic, but I just want to compliment your daughter's naming sense. As someone with actual chickens, I love the name Egg Lord. My first flock ever were all named after egg dishes: Quiche, Frittata, French Toast, Omelette, Chawanmushi, Eggs Benedict, and Carbonara. An Egg Lord would have fit right in.