Two wood rats
The wood rat was a small animal native to the planet Sphinx in the Manticore System. (SK1)
Treecats named this animal Bark-Chewer.
A wood rat was about two kilos in mass, and hexapedal like most Sphinxian animals. They were full-year active in their reproductive strategy, and lived near the Tannerman Gulf. Their constant gnawing on wood to keep their incisors sharp made them a danger to lumber products used by humans. (infodump)