 Submissive foxes will approach dominant animals in a low posture, so that their muzzles reach up in greeting.When two evenly matched foxes confront each other over food, they approach each other sideways and push against each other's flanks, betraying a mixture of fear and aggression through lashing tails and arched backs without crouching and pulling their ears back without flattening them against their skulls.When launching an assertive attack, red foxes approach directly rather than sideways, with their tails aloft and their ears rotated sideways.