Let me quote you a little bit from the article, to give you the context.
"A few years ago, my publisher, Farshore, came across an article deep in our archives. It was a 1966 interview ... with Daphne Milne, A.A. Milne's wife and Christopher Robin's mother. In it, she reminisced about Milne taking a small toy dog called Carmen with him when he served in the First World War ... The mascot was intended to bring him luck. He did indeed survive the war ... I immediately knew there was space in the Forest for a new female character, Kanga being the only one in the original stories. Carmen, in my mind, would be a very brave little dog ... To mark her bravery, I had the idea of this dog longing to be a lion - which is why she doesn't bark ... she roars."
Jane Riordan, Daily Telegraph, 21.09.23