They lose 1 point of food every 15 seconds, so to time how long until they start starving, multiply their current amount of food by 15 and then divide by 60 twice. This will give you the number of hours left untill the food stat reaches 0.
Obtaining this creature will require you to enter the tek trench where puprle liquid and the nests of these creatures lay past the bioluminescent chamber, there you must steal an egg and raise in a cold environment feeding it nameless venom you can get by killing nameless
It's quite easy if you know how to do it. First, get a decent megalosaurus or spino (I used a wild tamed meg with 382% damage), you can easily get to the trench from the element falls. Then, pick ONE egg that you are targeting. Kill the rock drakes around it. Make Zipline paths to that one nest and grab the egg. Zipline back to your mount and run. If a rock drake attacks you before you are on the zipline, use an apprentice or higher shotgun to kill it. Good luck survivor! Enjoy your rock drake!
The rock drake trench can be found at 57,56 at the area of the map called grave of the lost. Recommend u bring a glider suit and climbing picks and if u have a good tame to fight the drakes. In the wild they can be invisible and can glide in the wild so watch out also wear a HAZARD SUIT it's needed. Lastly there are a lot of nameless in the area so bring a light source. Good luck and ohh it needs to be cold to hatch so air cons
With TLC Update 3 out and wyverns are now breedable, I would definitely recommend getting a 190 high base stat breeding pair ready for the future as I don't see why they wouldn't make Rock Drakes breedable as well.
You can steal these eggs without any tames, just get a gen 2 tek suit, transfer to abb. go to the overlook and jump into the element water, let it charge your suit and then steal an egg. Charge your suit whenever you get low on power, tek suit back up to green zone/ wherever and you have yourself a drake, costs nothing at all and is super easy. Just remember to manage your element and you’re good. The suit doesn’t provide much protection though, so with a 450 hp char I was 2 shot, but you can use the tek leggings ability to fly away quickly.
DO NOT USE 1 POUNT IF FOOD EVERY 15 SECONDS IN YOUR EQUATIONS (for raising rock drakes) I’ve seen many comments that say this but i have tested it and the babies lose 1 point of food every 10 seconds! If you assume it as 15 seconds your baby will likely die!
You have to steal an egg like a wyvern. I used a lot of ziplines and a high level ravager to get down there, used the pick to climb up to an egg and ran. The drakes nearby WILL aggro on you. I got on my ravager and ran away on the ziplines. Make sure you have a hazat syit to protect you since there is radiation down there.