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My guess is one of the calves got lost somewhere along the way. Bighorners are communal - one missing calf and the whole herd gets ornery.Follows-Chalk

Bighorners of the Eastern Virgin is a side quest in the Fallout: New Vegas add-on Honest Hearts.

Quick walkthrough[]

Side Quest: Bighorners of the Eastern Virgin 
Advance Arrival at Zion to recruit Follows-Chalk as a companion;
ask about the local wildlife of Zion Canyon
Navigate the cliff trails near the Dead Horses camp to find the lost bighorner calf
Optional: Avoid killing any wild bighorners. 
Feed the lost calf banana yucca fruit to lead it back to its mother. 
Speak with Follows-Chalk. 
Reward: Variable XP
.45 Auto pistol
10 .45 Auto, hollow point rounds
War club 

Detailed walkthrough[]

After meeting him for the first time during Arrival at Zion, if Follows-Chalk is an active companion, the player character can ask him about interesting wildlife in Zion. He then mentions the herds of bighorners that roam the canyon, though notes some of them have seemed agitated lately and assumes one of the young calves got separated from its family and requests the Courier help to locate it. Chalk additionally asks that they try and leave the herd itself unscathed as the Dead Horses rely on them for meat and pelts.

Once triggered, head to Dead Horses camp east-southeast of the Eastern Virgin marker and go up the rocky slope found to the east of the camp. After maneuvering across the river over three rock bridges, one will find the lost mountain bighorner calf at the end of a narrow gorge opposite from the end of the last bridge.

Bighorner banana yucca

Banana yucca fruit, a favorite treat of bighorners

Getting the calf to follow the player character requires feeding it a banana yucca fruit. One will need at least 3-4 individual banana yucca fruits (there are at least three banana yucca plants along the route) as the calf periodically stops and has to be fed another before it will continue. Each feeding gets the calf to follow for around 10 seconds before needing another.

In order to complete the optional part of the quest, one must not get too close to any of the other bighorners found in areas along the path to the calf's grotto, otherwise they will attack. Sneaking past with a Stealth Boy will also prevent the bighorners from attacking. Alternatively, taking the Animal Friend perk will completely eliminate this risk as even the adult bighorners will remain non-hostile even in close quarters.

With the calf in tow, return back across the rock bridges to the first bighorner encountered, which is the calf's mother. One will then get a message prompting a choice to return the calf or keep it. There is no advantage to the latter choice, so it is advisable to ignore it in favor of the former. Afterward, speak to Follows-Chalk again to complete the quest and garner a reward of a perfect-condition .45 Auto pistol and war club and 10 .45 Auto HP rounds. If any bighorners were killed by the Courier in the process of completing the quest, Follows-Chalk will still give the reward but expresses his regret that their lives were lost. If no bighorners are killed, he will be happy and the XP for the quest will be 25% higher.

Quest stages[]

StageStatusDescription
5 Find a way up to the Cliffs.
10 Find the lost Mountain Bighorner Calf.
11 (Optional) Don't kill any of the mountain bighorners.
20 Get the calf to follow you back to its mother.
25 Get the calf to follow you back to the herd.
26 Take the calf to Follows-Chalk.
27 Kill all of the Mountain Bighorners.
30Quest finishedSpeak with Follows-Chalk.

Notes[]

  • The bighorner calf can fall off the rocks; while immune to damage, this still makes its pathfinding route difficult to reconcile.
  • It is possible for a bighorner to stray into the Dead Horses camp, where the NPCs may kill it if it becomes aggressive and cause the optional objective to fail.
    • Similarly, a giant cazador may appear and attack the bighorners.
    • Occasionally, a Dead Horses tribe member may also wander up the path leading to the bighorners herd and attack if they become aggressive.
  • If the bighorner mountain mother is killed before starting the quest, it can still be successfully completed by returning the calf and then talking to Follows-Chalk.
  • Occasionally, a bighorner may wander into a narrow pathway, causing issues especially when trying to go around it.

Bugs[]

  • PCPC Playstation 3Playstation 3Playstation 3 Sometimes the calf will not follow the player character even if they offer it banana yucca fruit.[verified]
  • PCPC Even if the bighorners were only angered and not killed, Follows-Chalk will still express regret as though their lives were lost.[verification overdue]

Gallery[]

Main quests
Act 1Ain't That a Kick in the Head · Back in the Saddle · By a Campfire on the Trail · They Went That-a-Way · Ring-a-Ding-Ding!
Act 2Wild Card (Wild Card: Ace in the Hole, Change in Management, You and What Army?, Side Bets, Finishing Touches) · The House Always Wins (I, II, III, IV, V, VI, VII, VIII) · Render Unto Caesar · Et Tumor, Brute? · Things That Go Boom · Kings' Gambit · For the Republic, Part 2 · You'll Know It When It Happens/Arizona Killer
Act 3No Gods, No Masters · All or Nothing · Veni, Vidi, Vici · Eureka!
Side quests
New California RepublicAnywhere I Wander · Back in Your Own Backyard · Bitter Springs Infirmary Blues · Boulder City Showdown · Can You Find it in Your Heart? · Climb Ev'ry Mountain · Don't Tread on the Bear! · Emergency Radio · Eye for an Eye · Flags of Our Foul-Ups · Hard Luck Blues · I Don't Hurt Anymore · I Put a Spell on You · Keep Your Eyes on the Prize · Medical Mystery · No, Not Much · Pressing Matters · Restoring Hope · Return to Sender · That Lucky Old Sun · The White Wash · There Stands the Grass · Three-Card Bounty · We Will All Go Together · You Can Depend on Me
Caesar's LegionBeware the Wrath of Caesar! · Caesar's Favor · Caesar's Foe · Caesar's Hire · Cold, Cold Heart · I Hear You Knocking · The Finger of Suspicion · We Are Legion
The StripBeyond the Beef · Bye Bye Love · Classic Inspiration · How Little We Know · Pheeble Will · Talent Pool · The House Has Gone Bust! · The Moon Comes Over the Tower
Freeside & Outer VegasBirds of a Feather · Bleed Me Dry · Debt Collector · G.I. Blues · High Times · Someone to Watch Over Me · The Coyotes · Wang Dang Atomic Tango
BoomersAnt Misbehavin' · Sunshine Boogie · Volare! · Young Hearts
Great KhansAba Daba Honeymoon · Cry Me a River · Don't Make a Beggar of Me · Oh My Papa
Powder GangBooted · I Fought the Law · Run Goodsprings Run · Why Can't We Be Friends?
Brotherhood of SteelEyesight to the Blind · Still in the Dark · Tend to Your Business
OtherCome Fly With Me · Crazy, Crazy, Crazy · Ghost Town Gunfight · Guess Who I Saw Today · Left My Heart · My Kind of Town · The Legend of the Star and A Valuable Lesson · Unfriendly Persuasion · Wheel of Fortune
Companion questsED-E My Love · For Auld Lang Syne · Heartache by the Number · I Could Make You Care · I Forgot to Remember to Forget · Nothin' But a Hound Dog · One for My Baby
Unmarked questsA Bit of Slap and Tickle · A Final Plan for Esteban · Access Powers · All Fired Up! · An Ear to the Ground · Andy and Charlie · Arachnophobia · Arizona Scavenger · Barton the Fink · Bear Necessities · Big Winner (Atomic Wrangler, The Gomorrah, The Tops, Ultra-Luxe, Vikki & Vance) · Bounty Killer (I, II) · Brotherhood Bond (I, II) · Caching in at the Cove · Cajoling a Cudgel · Claws Mended · Claws Out · Dealing with Contreras · Defacing the Humble Stone · Democracy Inaction · Eddie's Emissary · Exhumin' Nature · Fight Night · Flogging a Dead Corpse · Friend of the Followers · Gland for Some Home Cooking · Harder, Better, Faster, Stronger · Hat's Entertainment · Help for Halford · Hidden Valley computer virus · Highway to the Danger Zone (I, II) · Honorary Rocketeer · I Love Bananas · Iron and Stealing · Keith's Caravan Charade · Laurifer Gladiator · Lenk's Bad Debts · Lily and Leo · Long-Term Care · Malleable Mini Boomer Minds · Maud's Muggers · Meeting an Equal · Missing a Few Missiles · Most Wanted · Not Worth a Hill of Corn and Beans · Old School Ghoul · A Pair of Dead Desperados (I, II) · Papers, Please · Pistol Packing · Playing on the Old Joana · Powder to the People · Power to the People · Razzle Dazzle! · Reach for the Sky, Mister! · Rest and Resupply · Ringo's Caravan Rules · Rotface's Loose Lips · Saving (or Savaging) Sergeant Teddy · The Screams of Brahmin · Silus Treatment · Short-Term Treatment · Smooth-Talking Criminal · The Star Showdown · Strategic Nuclear Moose · Straus Calls · Strip Search · Suits You, Sarah · Tags of Our Fallen · A Team of Moronic Mercenaries · Thought for the Day · Tourist Traipse · Trudy's Radio Repair · A Trusted Aide · Useless Baubles or Fancy Trinkets? · We Must Stop Beating Like This · We Must Stop Meeting Like This · Wind-Brahmin Wrangler · You Gotta Break Out a Few Eggs · You Make Me Feel Like a Woman
Cut contentCut questsAuto-Inject Quest · Bright and Shiny · Chip Provenance · Debug Topics · Exploring Vault 74 · Jailhouse Rock · Meat of Champions (quest) · TempMan · Underpass Water Purifier · Viva Las Vegas! · Welcome to Fabulous New Vegas · World Changes Post-Endgame
Add-on quests
Dead MoneySierra Madre Grand Opening! · Find Collars (8: "Dog", 12: Christine, 14: Dean Domino) · Fires in the Sky · Strike Up the Band · Mixed Signals · Trigger the Gala Event · Put the Beast Down · Last Luxuries · Curtain Call at the Tampico · Heist of the Centuries · Big Winner, Sierra Madre · Return to the FountainCut content
Honest HeartsA Family Affair · Arrival at Zion · Bighorners of the Eastern Virgin · Chaos in Zion · Civilized Man's Burden · Crush the White Legs · Deliverer of Sorrows  · Departing Paradise · Flight from Zion · Gathering Storms · Gone Fishin' · Happy Trails Expedition · Prisoners of War · Retake the Bridge · River Monsters · Rite of Passage · Roadside Attraction · Sanctity of the Dead · The Advance Scouts  · The Treacherous Road · The Grand Staircase · Tourist Trap
Old World BluesAll My Friends Have Off Switches · A Brain's Best Friend · Coming Out of Her Shell · Field Research · He Came... And Went · Influencing People · Midnight Science Fiction Feature! · Old World Blues · On the Same Wavelength · Picking Your Brains · Project X-13 · Sonic Emitter Upgrade · Welcome to the Big Empty · What's in a Name? · When Visitors Attack! · X-2: Strange Transmissions! · X-8 Data Retrieval Test · X-8: High School Horror! · X-13: Attack of the Infiltrator!
Lonesome RoadThe Reunion · The Silo · The Job · The Launch · The Tunnelers · The Divide · The Courier · The End · The Apocalypse