mistakes I fell for :

sometimes members of a pack are left behind, meaning that when you kill off the pack you can see, so you will have to bring over more dinops, let them socialise for a bit and join the alpha's pack before killing them.

once you are at the feeding stage, the first bit of food will take ages, just use the tame tracker and afk or work on something nearby. after that, they feed pretty fast, so maybe use the first bit to gather food (I recommend prime meat)