After years Peckoltias suddenly started eating plants
I've had 2 "dwarf plecos" (Peckoltia), Hoover and Dyson, in a 75 planted tank for several years. They've never bothered any of the plants that I know of.
Now they've mowed down a patch of dwarf Sagitaria, even though there's lots of the same types of algae that they previously preferred (I assume) over the Sagitaria.
In the past, I have observed them cleaning the Sagitaria leaves w/o harming them. Now, they mow the Sagitaria down.
No, I don't feed them anything - and haven't for many years. There may be some less algae now than before, but still plenty of it. The back and side walls also have algae, which they've always eaten.
So, why the sudden change in their taste for plants? I've always heard / read they prefer algae to plants.