Most of the places I'd read about the 'pea method' actually said only 1/8 - 1/4 of a pea, once or twice a day, once a week, followed by a fast day (only one person said to fast the day before instead).
I just use a toothpick to cut the pea halves into 4 pieces ea and usually feed 2 pieces per betta once on pea day. When I had a sorority in the community tank however they did 'steal' as many of the other fishes peas as they could lol.
The only fish I've ever had eat itself to death is neon tetras, and it was on live black worms. Gorged itself till it basically 'blew.' Blech. I didn't care for cleaning that up...
When I feed worms now after the neons have had 2 or 3 I chase them away for there own good.
Gorgeous little girl!
Just a heads up, a lot of white bettas will eventually turn pink, so nothing to worry about if she does.
If you want I could send you a little hornwort, pm me. I could throw in a few mts (malaysion trumpet snails) and they would/could help with algae.
One of my betta girls would pull the snails out of their shells and eat them and another one eats them shell and all if they are small enough lol, helps with population control though.

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