Loose curves instead of a tight ball
The clearest relaxed signal in a ball python is in the name: a stressed one balls up. A python that is calm around other animals in the room lies or moves in loose, open curves, with its body soft against the surface and no tight, head-tucked knot anywhere along it. Its head stays out and visible rather than buried in the centre of a coil. When a dog crosses the room or a cat settles nearby and the python's coils stay open and unhurried, that looseness is your primary evidence that the python is registering the other animal without treating it as a threat.
Slow tongue flicks and a level head
A relaxed ball python tastes the air in slow, deliberate bursts of tongue flicks, often while its head moves gently from side to side as it explores. The head sits low and level with the body, not raised and pulled back. Contrast that with the warning set: a head lifted into a tight S-curve aimed at the other animal, rapid non-stop tongue flicking, hissing, or sudden jerky retreats. A python in feeding mode also looks different from a relaxed one, tracking movement intently with a fixed, forward focus, and that fixed stare near a small pet should end the session as surely as fear should.
Smooth movement and even breathing
Watch how a relaxed ball python travels. Calm movement is slow and flowing, the body advancing in steady waves, pausing to investigate and then continuing, with no freezing mid-motion at every sound. Breathing stays even and barely visible along the flanks; a python breathing fast, holding its mouth slightly open or inflating its body is stressed or unwell, not relaxed, whatever its posture suggests. A relaxed python may also yawn occasionally and reset its jaw, which is normal. What you should not see near other animals is repeated striking at the glass, frantic climbing or a python pressed motionless into the furthest corner for the whole encounter.
Relaxed still needs a barrier, every time
None of these signals makes direct contact safe. A ball python and another pet should always be separated by a closed, secure enclosure or a solid barrier, because a python that is relaxed at this moment can still react to a sudden movement, and a curious dog or cat can injure a snake in seconds. Read body language to judge whether shared-room time is even fair on the python: if the python shows the loose, slow, level-headed pattern, brief co-existence in the same room is reasonable; if it balls, hisses or strikes, the other animal leaves the room and future attempts happen with the enclosure covered or not at all.
Learn your individual python's baseline
Individual ball pythons have different baselines: one is naturally bold and exploratory, another is relaxed precisely when it is doing almost nothing. Compare the python's behaviour near other animals against its behaviour on an ordinary quiet evening, not against a description of someone else's snake. A change from baseline, such as a usually loose python balling tightly whenever the cat enters, is the information that matters, and it should shape the household rules. Recording those observations in KinsLe, with Care Teams assigning one person to supervise shared-room time for this python, keeps everyone reading and responding to its signals consistently.