Start with the enclosure
Check the basics for Tliltocatl kahlenbergi: fresh water, suitable moisture, a secure retreat, good ventilation and a practical temperature range of 20–25°C. A clear husbandry problem matters more than a single evening of unusual activity.
For New Mexican Tarantulas, keep a water dish available with a modest moisture gradient. If the enclosure is obviously too wet, too dry or difficult for the spider to use normally, correct that issue before looking for a more complicated explanation.
Know what is normal
For Tliltocatl kahlenbergi, New Mexican Tarantulas are terrestrial tarantulas, so normal retreat use should make sense for that lifestyle. A hidden spider is not automatically a stressed spider, and a visible one is not automatically comfortable.
With Tliltocatl kahlenbergi, changes from the individual's usual routine are more informative than a generic list of 'stress signs'. Compare activity, feeding and retreat use with what the same spider normally does.
Climbing, pacing and restlessness
If a New Mexican Tarantula repeatedly climbs or paces, check enclosure shape, moisture and recent disturbance. Mature males of Tliltocatl kahlenbergi may also roam much more after the ultimate moult.
One short burst of activity from Tliltocatl kahlenbergi matters less than a persistent pattern combined with poor body condition or an obvious enclosure problem.
Feeding changes
With Tliltocatl kahlenbergi, food refusal in New Mexican Tarantulas is often normal around premoult, after a heavy meal or following a rehouse. Keep water available and remove ignored live prey.
If Tliltocatl kahlenbergi stops eating but remains well hydrated and otherwise behaves normally, observation is usually more useful than repeatedly opening the enclosure and offering food.
Changes that need quicker attention
In Tliltocatl kahlenbergi, visible injury, haemolymph loss, severe dehydration, inability to stand normally or major loss of coordination in a New Mexican Tarantula deserves prompt attention.
If Tliltocatl kahlenbergi is physically deteriorating, correct any obvious husbandry problem immediately and seek experienced or veterinary help where appropriate.