From Melvor Idle
This page is up to date (v1.2.2).
Pet ID: melvorD:Beavis
Source: Woodcutting
Drop Chance: See: Acquiring Pets
Effect: +5% Chance to Double Items in Woodcutting
Part of 100% Completion: Yes

Beavis is a pet acquired through Woodcutting. The +5% chance to double logs provided by Beavis is additive with other item doubling effects such that those from Woodcutting Mastery and Aorpheat's Signet Ring.

There is no best log to chop to acquire Beavis, all logs are equivalent.