I had issue where after feeding it once it wouldnt be ready for another one after a couple of mins of waiting...i just ran infront of it till it aggroed me then ran till it dropped aggro then it would let me feed it normally till it was tamed
For beginners these things will spot you in a split of a second so don’t even think of going up to it with a stimberry in your hot bar. Instead, get a ghille suit and sneak behind it and feed it a beer! Don’t use stimberries it is pain And time consuming unless you have a bush of stimberries. They eat berries after they are tamed though. Not beer.