verify my hyphen usage?

[Sakmeht]

Hi all,

I've been brushing up on hyphen usage, but I'm not 100 percent on these. I think they're right, but if I could get some opinions, I'd appreciate it.

Here are three examples:

Egg Eating in the Backyard Flock (title)

This article addresses different ways to break the egg-eating habit.

Egg eating is a learned behavior and your other hens will pick up on it quickly.

...have discovered what you believe to be egg eating in your flock,

Thanks

[Sakmeht]

Upon doing some more research it appears I have a noun + present participle and they should all be hyphenated.
I'll change it up. Thanks for looking!