I think unfortunately I'll find it very hard not to see it as Tony Stark chatting with animals.
I think that's a big drawback (for actors) of these huge multi-movie roles... Like I watched "Gifted" and it was a retired Captain America raising his genius niece
.
Easier for the ones who have a very different look or don't use their real accent I suppose. But RDJ has a Stark vibe in everything, even in interviews.