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.
((15 x food)÷60)÷60
I used a very effective method but it sounds like a joke, but it works fine: use a gasbag, 20-30 vegatible cakes for gasbag healing and like 10-15 stacks berries for gasbag food and at least 2 hazard suits. You can easily fly down to the spots where the nests are, then fly to the nests, steal the eggs, fly to the entrance of the complex and repeat it. Important: if you want to play safe, then only take the nests on the highest spots, because if you go for the lower spots, it can happen, that an army of drakes stuck you into a nest and your gasbag and you will die. If the cakes are empty, you have to go back to the "non radiation zone", cause after a time without healing the radiation is too much dmg for the gasbag. But this method only works fine, if you a) can control the gasbag and b) the gasbag should have at least 6-10k hp, 2-2,5k stamina and over 100k oxygen. And don't forget to regain stamina and gas every time.
I was with a decent size tribe with a bunch of friends.They raised a bunch of rock drakes when i joined them.However, there was one Rock Drake in Particular that was laying in the corner of the dino pen that has been neglected, never being used cause previous owner from the tribe has stopped playing ARK. The tribe decided that i earned the right to claim the Rock Drake as my own. It was only a 140, but i cherished that thing like a real buddy.I named him "Anon Loves me".Because he always had my back in the darkest time. When i first glided through the air with the drake. It showed me a side of ARK i never knew before, and showed me the oppurtunities the world had to give to me.
Unfortunatly the happy moments came to an end. We got attacked by a bigger tribe while i was on. My tribe leader insisted i flee and transfer servers. However, i could not take "Anon loves me" at the time cause of the sudden ambush. The Rock Drake and I looked at each other one last time before parting ways..
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
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
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!
Best method for stealing eggs: Tame 2 megalosaurus (opposite gender) and breed them. Your imprinted baby will be the one you ride on. Then, you take your imprinted megalo and the opposite gender for mate boost. Btw each megalo should have at least 14k hp and 320 melee. Use this method for easy first drake.