Here is the full list of all 19 Secrets of Rætikon achievements.
Never get hurt
Don't hurt anything
Avoid the unavoidable
Find all hidden rune orbs
Hit an animal with a thistle
Hatch a buzzard and let it kill a lynx
Never get critical health
Carry a total of 130 slivers
Get a female rabbit to give birth to 8 babies
Throw and Catch rabbit in mid air
Lift a lynx in the air by its tail
Dive the deepest well
Feed the daw with prey
Bring an animal from one area to another
Hurt a buzzard by letting it dash into a solid
Get a daw to fight a buzzard
Get a buzzard to hit a lynx
Hurt an animal with a stone you dropped
Hatch a bird