Choose a small, secure enclosure
Use a container that lets you find the sling easily and place food near its retreat. A tiny spider in a huge enclosure is harder to monitor and can miss prey. Ventilation holes must be smaller than the carapace. If you think the gap looks tiny, assume the sling can make it look enormous.
Match the shape to the species. Terrestrial and fossorial slings need substrate depth; arboreal slings need vertical structure and ventilation.
Moisture depends on species and size
Small slings dehydrate faster than adults, so many benefit from a controlled damp area even when the adult species is kept quite dry. That does not mean saturated substrate. Keep part of the enclosure slightly moist and let the rest breathe.
As the sling grows, husbandry can move toward the adult pattern. Species from drier environments usually need less substrate moisture than moisture-dependent tropical fossorials.
Water for tiny slings
Once a sling is large enough, a tiny water dish is useful. Bottle caps, small purpose-made dishes or other stable shallow containers work. Tarantulas do not routinely drown in sensible water dishes.
For extremely small slings where a dish is impractical, carefully add water to one area of substrate or wall so the spider can drink droplets without flooding the container. The aim is access to water, not constant mist.
Feeding small prey
Offer prey the sling can subdue. Tiny crickets, roach nymphs and fruit flies can work; pre-killed prey pieces are also valuable for very small or timid slings. A sling can scavenge fresh pre-killed prey.
Remove leftovers before they decay. If a live feeder is larger than the sling or the spider appears close to moulting, do not leave it loose in the enclosure.
Premoult and hidden slings
Slings often burrow and vanish before a moult. A sealed tunnel is not an invitation to dig. Keep the moisture gradient stable, remove live prey and wait. Small slings can emerge looking dramatically larger after only one moult.
A darkening abdomen, food refusal and reduced activity are useful clues, but every species presents differently.
When to upgrade the enclosure
Rehouse when the sling has clearly outgrown the container or maintenance has become awkward, not because a calendar says it is time. Move a fully hardened spider, not one in premoult or immediately after a moult.
Upgrade in steps. A series of appropriately sized containers is usually easier and safer than jumping from a sling pot to an adult display enclosure.
Common sling mistakes
The most common problems are oversized enclosures, escape gaps, drowning the substrate, allowing a moisture-sensitive sling to dry completely, offering prey that is too large and digging up a burrow to “check.” Most are solved by making the setup smaller, simpler and more stable.
Keep notes on feeding and moults. With a small spider that is hidden often, records are more reliable than memory.
How often should a sling eat?
Slings generally eat more frequently than adults because they are growing quickly, but a fixed twice-a-week rule is still too crude. Offer small food items, watch the abdomen and reduce feeding as premoult approaches. Some fast-growing species will eat frequently; slow-growing genera may take smaller meals with longer pauses.
Food refusal in a plump sling is often premoult, not a crisis. Remove live prey, maintain water or the moisture gradient and wait. Trying a different feeder every few hours simply creates disturbance.
Label everything
Sling collections become confusing quickly because many juveniles look nothing like the adult. Label the scientific name, acquisition date or size and any important locality/form information on the enclosure. If the species has an old hobby name, keep that in your records too, but use the accepted name as the primary label.
Good labels protect against husbandry errors and accidental swaps. They also make future moulting and growth records far more useful, especially once you have dozens of similar-looking containers.
Growth rate changes the workload
A fast-growing species can outgrow sling containers quickly, while a slow Grammostola may stay in the same setup for many months. Check the spider after each moult rather than following a generic rehousing calendar. The new leg span, not the date on the label, tells you when the enclosure is becoming cramped.
Growth also changes moisture tolerance and prey size. Husbandry should evolve with the animal instead of staying frozen at the conditions used for a 1 cm sling.
Do not lose locality and form data
If you buy a sling with a locality, colour form or hobby-form label, keep that information attached to the animal. Tiny slings may be impossible to identify visually, and once the label is lost it cannot be reconstructed reliably later.
This is especially important in genera where multiple forms circulate under similar common names. A simple printed or written label protects the value of the information even when the spider itself looks like a small brown dot.