Bambi: The Reckoning (2025, dir Dan Allen)

After a mother (Roxanne McKee) and son (Tom Mulheron) get in a car wreck, they soon become hunted by Bambi, a mutated grief-stricken deer on a deadly rampage seeking revenge for the death of his mother.

https://www.themoviedb.org/movie/1049942-bambi-the-reckoning