Species-Specific Tarantula Diets: Do Different Tarantulas Need Different Food?

Most pet tarantulas are insectivores, so the broad answer is that they eat many of the same feeder insects. The important difference is not usually which species of tarantula gets a completely different food, but how that food is offered. Size, age, activity level, habitat type, and molt status all affect what works best. A fast-growing sling may need tiny prey more often, while a mature adult may do well on larger prey offered less frequently.

A practical rule is to match prey size to the tarantula. Many keepers use prey that is about the size of the tarantula's abdomen or smaller. Slings often do best with flightless fruit flies, pinhead crickets, or pre-killed small roach nymphs. Juveniles and adults usually handle crickets, dubia roaches, red runner roaches where legal, mealworms, superworms, or occasional hornworms. Soft-bodied feeders can help with hydration, but very fatty feeders should stay occasional.

Species differences matter most in behavior and environment. Arboreal tarantulas may respond better to prey that climbs, while heavy-bodied terrestrial species may prefer ground-moving prey. Fossorial species may eat less often if they stay hidden. Desert and tropical species do not necessarily need different insect species, but they do need feeding routines that fit their enclosure humidity and stress level. If temperatures are too low or the tarantula is unsettled, appetite often drops.

Gut-loading feeder insects for 24-72 hours before feeding can improve their nutritional value, and using captive-raised feeders is safer than collecting insects outdoors. If your tarantula stops eating for weeks but is otherwise behaving normally, premolt is a common reason. Your vet can help if appetite loss is prolonged, paired with weight loss, or happens outside a normal molt pattern.

There is no one perfect number of insects for every tarantula. A safer approach is to feed based on life stage, body condition, and molt cycle. Slings are often offered very small prey every 2-4 days. Juveniles commonly eat every 4-7 days. Many adults do well eating every 7-14 days, though some large females may take more and some species naturally eat less often.

For portion size, one appropriately sized prey item is often enough per feeding for a small or moderate-sized tarantula. Larger adults may take one to three insects, depending on prey size. Overfeeding can lead to an overly large abdomen, which may increase injury risk if the tarantula falls. A common keeper guideline is to avoid letting the abdomen become dramatically larger than the carapace.

Do not force a feeding schedule if your tarantula is in premolt. Signs can include reduced appetite, increased hiding, dull coloration, webbing changes, or a dark bald patch in New World species that kick urticating hairs. Once a tarantula molts, wait until the fangs have hardened before offering food again. For small tarantulas this may be several days, while larger adults may need a week or longer.

If you are unsure how much your individual tarantula should eat, your vet can help you build a feeding plan around species, age, and enclosure setup. That is especially helpful for slings, recently imported animals, breeding females, or tarantulas that have gone off food for longer than expected.

A missed meal is not always a problem in tarantulas. Many healthy tarantulas refuse food before a molt, after a recent move, during cooler periods, or when stressed by enclosure changes. What matters more is the full picture. Concerning signs include a shrunken or wrinkled abdomen, weakness, trouble climbing, repeated falls, inability to subdue prey, or persistent refusal to eat outside a normal premolt pattern.

Watch the enclosure too. Uneaten crickets or roaches can stress or injure a tarantula, especially during premolt or after molting. Mites, mold, foul odor, or feeder insects dying quickly may point to husbandry problems rather than a true diet issue. Dehydration can also look like poor appetite, so water access and species-appropriate humidity matter.

More urgent signs include being stuck in a molt, leaking fluid after a fall, a severely collapsed abdomen, or a tarantula that is unresponsive and curled tightly with legs tucked under the body. See your vet immediately if you notice those signs. Tarantulas can decline quickly once they are weak or dehydrated.

If your tarantula has stopped eating for an unusually long time for its species and stage, bring your vet details about prey type, feeding frequency, temperature, humidity, molt history, and any recent enclosure changes. That information often helps your vet sort out whether the issue is husbandry, stress, dehydration, or illness.

If your tarantula is not taking one feeder well, you usually do not need a completely different diet plan. Instead, try safer feeder alternatives that still fit an insect-based diet. Good options include captive-raised crickets, dubia roaches where legal, discoid roaches, mealworms, superworms, black soldier fly larvae, and occasional hornworms for moisture. For slings, pre-killed pinhead crickets, chopped mealworm pieces, or flightless fruit flies can work well.

Variety is helpful, but it should stay controlled. Waxworms and other very fatty larvae are better as occasional treats than staples. Wild-caught insects are not a safe substitute because of pesticide exposure and parasite risk. Vertebrate prey, dog food, cat food, raw meat, and table foods are also poor choices for routine feeding.

If live prey stresses your tarantula or disappears into the enclosure, you can ask your vet whether pre-killed prey is reasonable for your species and setup. Many tarantulas, especially slings or shy burrowers, will accept freshly killed insects placed near the retreat. This can lower the risk of prey injuring a molting or weakened spider.

The safest long-term alternative is not a commercial pellet or a homemade mix. It is a rotation of properly sized, captive-raised feeder insects offered on a schedule that matches your tarantula's species, age, and molt cycle. If your tarantula has repeated feeding trouble, your vet can help you adjust both diet and husbandry together.