There are four animals that you need to interact with to get the "Animals of the Land" trophy in Shadow of the Colossus (SOTC) remake.
To interact with them, you simply need to grab hold of them with R2. The only one you cannot grab hold of is the turtle, and for that you just need to trip on it. It took me a long time to get the turtle to register, so make sure you trip on them many times.
Check this video (not mine):
All credits go to HarryNinetyFour.