Did Dumbledore know that James was an animagus?

Albus Dumbledore knew exactly what James, Sirius and Peter were up to with Remus. But did not know their respective forms. Albus Dumbledore knew the Marauders were Animagi.

How did Sirius communicate with Crookshanks?

Before outing Scabbers as treacherous Death Eater Peter Pettigrew, Crookshanks was able to communicate with Sirius in his dog form, steal the passwords to the Gryffindor common room for him, and create the purr-fect plan for capturing the traitor.

Why didn’t Dumbledore know that Potter was an Animagus?

It is worth noting that James Potter saved Severus Snape from Remus Lupin without transforming himself, because Snape told to Dumbledore about Lupin being a werewolf, but never mentioned Potter being an Animagus, as can be deduced by the fact that Dumbledore, as stated above, didn’t know it.

Did the Order of the Phoenix know that the Marauders were Animagi?

Albus Dumbledore indirectly stated that the Marauders never revealed to anyone, the Order of the Phoenix included, that three of them became Animagi until mid-1994, when Sirius Black told the entire story to him. It is unknown if Lily Evans knew it, but as she married James Potter, she supposedly did.

Do Animagus know what their animal form will be prior to transformation?

An Animagus does not know what their animal form will be prior to the transformation. Albus Dumbledore indirectly stated that the Marauders never revealed to anyone, the Order of the Phoenix included, that three of them became Animagi until mid-1994, when Sirius Black told the entire story to him.

Why didn’t more witches and wizards become Animagus?

The process of becoming an Animagus was long and arduous, and had the potential to backfire and cause the transformation to go horribly wrong. Many witches and wizards simply felt that their time might better be employed in other ways, as the skill was of limited practical use unless one had a great need of disguise or concealment.

https://www.youtube.com/watch?v=WtBtLoDnv_E