Well, buns are a lot like people: some self-regulate better than others.

I’m not crazy about the SF free-feed. It’s designed for buns who neglect their hay in favour of pellets. Ideally, buns should rely very little on pellets, consuming mostly grass/hay and fresh or dried leaves.

Since one of your buns likes to eat for two, one technique that often works well is scatter feeding or feeding in opposite/far cornes of their space: it makes it difficult for the piggy bun to push the other bun out of the way and gobble up their food.

And as long as they have unlimited supplies of hay, they’re never in danger of starving. Despite myths to the contrary, hay is quite nutritious.

Agreed that some will regulate themselves, and some wont. I tried to free feed my trio when they first started sharing a cage together, and nothing worked. They would just eat the pellets and ignore their hay unless it was a while before i refilled their bowl. I think i tried for about 3 days before cutting back to feeding a single cup of pellets a day since they clearly couldnt handle it themselves. Which is fine, its not a bother

The type Sherwood has that is mostly hay can be free fed. A picky bunny is likely not more interested in those than in actual hay, so I don’t quite see the point. I tried an all hay-pellet once, my “pig” bun ate it, the other one refused it.
“Normal” pellets needs to be fed in limited amounts to most adult bunnies unless there’s an underweight problem. I think I could perhaps free feed my Yohio, but my Bam is like a labrador dog, he’d probably eat until he fainted.

I’m sure if I try to free-feed my two boys, they would end up at the vet. They eat like vacuums.