Dear Mister XXX
We just received your email regarding our Badger Pellets and we already thank you for.
During the production process, some pellets could stay more longer in the spinneret and they could take a darkest color which is not an issue for quality or calorific matter.
We can assure you that those pellets can't damage your installation. So you can burn them with no concern.
Thank you for your understanding.
Regards
The Badger Pellets Team