From the cartoon Hilda, a deerfox (aka "deer fox" or "deer-fox") is a furry creature resembling, as the name suggests, a cross between a deer and a fox.

From the Hilda fandom wiki:
Deer-Foxes have the head, body, and tail of a fox, but with antlers and hooved feet like a deer. They have fluffy tails that are roughly as long as their bodies.
Babies and cubs resemble a fox more than a deer, while adults resemble deer more than a fox. This is shown with how adult deer-foxes have long, deerlike legs, while cubs and babies have legs more like those of a fox.
Both male and female have antlers, though the antlers of the male are larger. Alpha-males have the largest antlers.