The Rex flop and stretch say it first
A relaxed Rex rabbit shows contentment with his whole frame, not one signal. The clearest sign is the flop: he throws himself onto one side, sometimes with a little twist, and stays there with hind legs kicked out behind him. A full-length stretch with front paws reaching forward and his chin lowered to the floor says the same thing. So does a loose loaf, where his body looks soft and rounded rather than pulled tight, and his weight settles evenly instead of bunching ready to bolt.
Ears, eyes and jaw on a content Rex
On a content Rex rabbit, the upright ears rest in a neutral middle position, angled slightly outward, neither swivelled hard toward every sound nor flattened against his back. His eyes are heavy-lidded and may close to slits while he rests, and his jaw stays slack between nibbles. Gentle tooth purring, a soft clicking you can feel as much as hear when you stroke his plush, velvet-like Rex coat, is a pleasure signal. His nose tells the same story: a slow, barely moving nose on a resting Rex means he is not sampling the air for trouble. Breathing follows the same pattern, with long, even breaths that you can watch moving through his ribs without any hitch or hurry. Even his feet give him away: a settled Rex lets his hind legs slide out sideways or behind him at angles that would make a fast getaway impossible, which is precisely the point, because a rabbit who expected danger would keep those powerful legs folded underneath him, loaded and ready.
Happy movement looks unhurried in a Rex
A content Rex rabbit moves around his space without urgency between rests. He hops a short distance, pauses to wash his face with both front paws, then flops again in a chosen sunny or sheltered spot. Short bursts of binkying, where he leaps and twists mid-air, and brief zooming laps of the room are excitement, and a Rex who does them and then settles quickly is a Rex who feels safe in that space. Eating is equally telling: a relaxed Rex pulls hay strand by strand and chews at an easy pace, rather than snatching food and retreating to a corner to eat it.
Read the whole picture against his tense signals
Judge a Rex rabbit's relaxed signs against their opposites so you do not misread him. A tense Rex freezes with ears pinned and eyes wide and round, thumps a hind foot, grinds his teeth loudly, or presses himself flat into a corner with his body trembling. A resting Rex can look still too, but his stillness is soft: muscles loose, breathing slow, ears neutral, and he will shift position comfortably if you move nearby. If a normally flopping Rex stops flopping for a couple of days, hides more, and eats less hay, that change from his own baseline is worth a vet call, because appetite loss in any rabbit matters quickly. Keep a short shared note of when your Rex flops, tooth-purrs and binkies, and KinsLe Care Teams lets each person in his care circle add their own sightings with a timestamp so a subtle shift in his contentment shows up early.