This is a ref I made with Khalypso's wolf maker, an approximation of a feral wolf form of my werewolf character Trasi (she does not have a last name yet).

This shows off some details of the character. Gray fur, dark grey ears, white face and belly, light grey fur on her back and tufts of fur on her legs. Her eyes are silver too. The colors aren't entirely accurate, though. I based her appearance on her human, which is an adoptable. Look here if you want to see her real hair, ear and tail color. She's the one on the bottom left corner.

I should also mention that Trasi doesn't have a feral form in my universe. Like all werewolves, she can appear human, kemonomimi or full anthro. She is from medieval Germany, an assassin of redhoods (werewolf hunters then associated with the Vatican). As you can see in the pictures of her human form, she often wears iron blades on her fingers as a weapon. She also appears often in the nightmares of Carmen Engeldorf, redhood deaness and her rival. She often gets intimate with her, a closeted lesbian and outward prude, in those dreams.