To give an update on tigers:
This is how it all worked for me.
From birth every minute, it will gain 1 food count. I used bone marrow for the baby it seemed to give the baby better health points than anything else. So, I spent a lot of time stocking up to 500 bone marrow in a preserving bag keeping ice in it.
The baby is NOT tied to your character hot/cold stats so, don't go by them to keep your baby alive.
After an hour your up to 70 and when it gets to 2 rows of food it gets easier but be vigilant of these times:
In-game time(s) are found at the Atlas tab at the top. (everyone knows this?)
12:00 around that time they will ALWAYS need an Icebox to cool down (Hot icon appears)
till 14:45. In rare cases, the hot icon will disappear and if you turn off your icebox it will come right back in a few seconds.
21:45 around that time they will ALWAYS need a fire, Grill, works best, (Cold icon appears),
all night is ok and you only need one per animal I think but, I only have time to raise 1 baby at a time.
I have not worked out that evening time because I go hunting for bone marrow at that time (elephants), and make salted meat for the carnivore troth, I fill it full of the "none prime" meat it's cheap! Salted anything lasts longer and ALL carnivores will eat it just fine.
Tons of salt TONS!, to make it but once full it''ll last days. But now because of baby I will get it full for when the baby can feed off the troth. Because I will need real-life sleep.
The time when you have 3 food rows it's a little less work to maintain the baby but you should keep about 200 minimum in the baby if you have attention issues keep it full but do check it from time to time just make sure till baby is juvenile you are bound to this for
NOTE: If you do not address the hot with an icebox the baby will die and the same if you do not address the cold with some sort of fire. I NEVER had to force feed it! Salted meat lasts 4 hours and unsalted meat lasts 40 minutes. Also, note once the times are up for hot and cold you can call the baby over to the other device. I also like to plan the breeding time for an even clock time like 06:00 or 05:00 so is easier to know what times in real life things need to happen. At first birth tip, you only need to keep it full of bone marrow and once full just keep stacks or five on you and try to add more to determine what inventory count the baby is up to. Plan the first 3 hours managing the food and temps, then when things get easier do things that take a little longer but don't go fare. Mostly I think you can manage the feeding and figure that out (don't run out of food) but the times is gets cold and hot are cracked. It's 6 hours to get it to the troth or juvenile state! 6 HOURS! of fun, yeah it is learning the science of the game is fun as a single player.
The Imprinting is 6 times at 8 hour wait times in between, sleep set alarm to take it for a walk touch it, whatever it wants. then repeat ever 8 hours to get all the imprinting.
Imprinting is useful for you as the rider and nobody else the stats nearly double when you ride the (ARK like I guess).
Someone should add some of this to the Wiki I don't have time I am playing Atlas!