So i found out about an exploit including the Drecko. When you wrangle a sheared Drecko its scales will grow back and everything else will be reset even if its tamed. That means that you can exploit it to get a lot of reed fibers and plastic (i haven't tested Glossy Dreckos but i expect them to have the same outcome). EDIT: I tested on Glossy Dreckos and it also works as expected, which means you can also get infinite amount of plastic. I think you can do that on all critters its just that on the Dreckos their scales grow back so they can easily be exploited.
You need to wrangle the Drecko and then all of its stats will reset including its scales.