Hunter talent · row 3 of Beast Mastery, from level 20 (15 with Talented 5/5) · Physical

Bestial Swiftness

Increases the movement speed of your pets by 30%.

Game files · build 1.60.1.70245Read from the WoW Forever beta client, build 1.60.1.70245.

Compared with Classic

Classic tooltip

Increases the outdoor movement speed of your pets by 30%.

What Blizzard said about Bestial Swiftness, each line checked against the files.

Matches the files
Intimidation: Now requires Bestial Swiftness as a pre-requisite. Now also grants your pet 100% increased critical strike chance on its next attack.
The files Intimidation (19577) requires Bestial Swiftness in the 70245 tree; Classic had no prerequisite. A new second effect gives the pet's next attack +100% crit chance (tooltip).
Intimidation Bestial Swiftness Class deep dives: Hunter and Druid

69876 Sep 16First beta build we archived. No changes in the client files since.