Food refusal
A sudden refusal of prey is common before a moult in Chilobrachys fimbriatus, especially when the spider had been feeding normally beforehand.
Remove ignored live prey from the Indian Violet Tarantula enclosure instead of offering another feeder immediately.
Retreat use and webbing
Chilobrachys fimbriatus may spend more time hidden, close a burrow entrance or lay heavier webbing before moulting. Leave the retreat intact.
Do not dig out an Indian Violet Tarantula simply because it has sealed itself in. Retreat closure can be normal premoult behaviour.
Abdomen changes
In species where the abdomen is visible, Chilobrachys fimbriatus may show a darker exposed patch or other colour change as a new exoskeleton develops underneath.
Not every Indian Violet Tarantula shows an obvious visual change, so use abdomen appearance alongside appetite and behaviour rather than as the only sign.
What to do
When premoult looks likely in Chilobrachys fimbriatus, remove live prey, keep fresh water available and keep the enclosure within its normal moisture and temperature range.
Do not increase handling, spraying or enclosure disturbance for an Indian Violet Tarantula. Stable conditions and patience are normally what the spider needs.
How long can premoult last?
Premoult in Chilobrachys fimbriatus can last much longer in a large animal than in a tiny sling. The passage of time alone does not prove something is wrong.
Judge an Indian Violet Tarantula by overall condition and enclosure access to water, not by expecting every spider to moult on the same timetable.