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Swiftlets come to play, but never nest?

Three sound changes, and the planks are still empty. We know that feeling; we have spent the money too and watched swiftlets come and go.

Do not rush to change the sound. NBH is a concentrated scent that attracts swiftlets. Spray in the morning, watch the birds in the evening.

100→400 birdsa house stuck for years, within a month
40→122 nests3 months, while fixing the house
Since 2014sold ever since, with repeat buyers

Two customers; both fixed their house basics first. Customer videos below.

Try one bottle first · 4 litres → Small 1-litre bottle (limited time) → Buy one bottle: no effect within a month, no need to send it back, we refund you. Not sure yet? Ask us on WhatsApp first →

MDK Nest Boosting Hormone NBH 4 litres

Filmed by customers, see for yourself

Whether it works is not for us to say. These clips were sent to us by swiftlet house owners who use NBH.

A customer's message and the view inside: new birds clustered together
Same sound as before; after NBH, new birds come to the entrance hole one by one
A swiftlet house owner in Pahang calls after spraying NBH
Outside the house, new swiftlets drawn in

Want a closer look before deciding? The details are below ↓

The details are below. What it helps with, how to use it, why it works, more customer results, and how the refund works. Read first, decide after.

What it can help with, and what it cannot

It helps

Swiftlets come to look and play, but few stay.

The basics of the house are fair, but nests grow slowly. Building the scent first lets them treat your house as home sooner. It is an accelerator.

New house or old house? An old house with its own droppings scent only needs NBH. A new house under 100 nests without its own scent yet, look at Dark Sky Aroma (DSA). Not sure? Tell us roughly how many nests you have now and we will tell you which one.

Not enough on its own

If the house has other problems, even the best scent will not keep the birds.

A badly designed entrance hole, predators (snakes, owls), sound that is not tuned right, a flight path that does not flow, mouldy nesting planks.

We check these for free; just send a video. Once the problem is fixed, the effect shows.

One more thing: judge it over months, not days. Be careful with anyone who promises results from one spray.

How to use it: three steps

STEP 1 · DiluteShake well before opening and wear a mask. For spraying, mix 1 part NBH with 4 parts clean water.
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STEP 2 · Spray the right placeOn a dry morning, spray the walls in the area with the most nests. The main thing is not to spray the planks themselves; a wet plank grows mould. Roughly one to two feet below them is fine. Spray only where swiftlets are nesting; the roaming room does not need it.
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STEP 3 · Look in the eveningWatch behaviour, not numbers: more calls, livelier flight, birds chasing in pairs, older birds bringing new ones in.

Why spray where the nests are? The idea is simple: the scent only works if swiftlets smell it. Spray where birds and nests already are, and at least you know they will smell it; once they do, they call other swiftlets in. Where no bird smells it, the spray is wasted.

Want the scent to last longer: use an aquarium bubbler

Spraying works, but the scent fades fast. For a bubbler or a swiftlet-scent diffuser, make it stronger: mix 1 part NBH with 3 parts water, pour it into a bucket and run an aquarium air bubbler where the birds are, so the scent is released slowly and stays in the house longer.

Why a scent helps

NBH releases what swiftlets need to find a partner and mate, so they settle in more easily and come into the mating season sooner. Swiftlets build up that scent in a house themselves, but it takes years; building it first gets your house there sooner. NBH extracts swiftlet scent from swiftlet feathers, adds seaweed extract and other organic matter. No droppings and no ammonia added.

It stinks, and that is normal. The smell is for the swiftlets, not for you.

Swiftlets mating
Swiftlets mating (YouTube)

More customer results, with the conditions

100 → 400 birdsA house stuck for seven or eight years went from 100 birds to 400 within a month. The condition: the basics of the house were fixed first, then the hormone could help.
40 → 122 nestsA customer said, “Let me try it for 3 months.” After 3 months, nests went from 40 to 122. We usually advise spraying where there are already many nests; he sprayed an area with no nests, and that area too started showing fresh droppings and new nests. He also fixed other problems in the house at the same time.
400 to 500 more nests in a yearA customer who had tried another brand of hormone came back to NBH and added four to five hundred nests in a year. In his words: “Personally, I think MDK's hormone is good.” He did not say whether anything else in the house was changed.
Veterinary ServicesThe Department of Veterinary Services (DVS) once bought NBH from us to give to swiftlet house owners. Some saw new nests being built after using it and shared the photos in their WeChat group.

More customer videos

After using NBH, fresh droppings appear

A 16-month-old swiftlet house, in the customer's own words (YouTube)

Refund and how to buy, plainly

No effect, money back. Buy one bottle, and if it shows no effect within a month, tell us on WhatsApp; no need to send it back, we refund you. A scent needs time to work, so you get a month. Not valid for the buy 3 free 1 offer; by then we take it that you already know the product.

FAQ

I sprayed and saw no reaction?

If there is no reaction at all, it is usually not the scent; check the sound and predators. A reaction is not the same as settling in either: the scent has to last and the house basics have to be right. Send us a video and we will see where it is stuck.

Will it turn the nests yellow?

No ammonia or anything like it is added to the formula. Yellow nests usually come from plank condition, humidity, or how nests are harvested and stored. If it happens, send us photos.

Can I use it in a new or empty house?

Yes. Some customers used it in an empty house before they started attracting swiftlets. But check the entrance hole and flight path first; the right scent with the wrong entrance hole still brings no birds.

How is it different from DSA?

DSA is built on NBH: 80% NBH plus 20% droppings extract. New houses under 100 nests without a droppings scent, use DSA; old houses, NBH is enough. Pick one, no need to buy both. What do I need?

Will the birds definitely come?

Not necessarily, and we do not make that promise. The scent brings the guest to the door; if the door is broken, he still leaves. That is why the house basics come first.

Can I mix it with another brand of aroma?

We do not recommend it. Layered scents confuse the birds, and you cannot tell which one is working. If you switch, switch fully and give it enough time.

Why is there no price on this page?

Prices change, so we keep them in our online shop, Kedai Dr.Burung, which is always current. This page only covers what NBH is, how to use it and whether it suits your house.

Read it all? Start with one bottle

Try one bottle first · 4 litres → Small 1-litre bottle (limited time) → Buy one bottle: no effect within a month, refund, no need to send it back. Want to ask first? Message us on WhatsApp →

Already using it? After you see a few more birds, the real work begins.

Those extra birds tell you the house has hope. To know how much more it can grow, we need to see where it is stuck. This is the MDK Swiftlet House Diagnosis Method: diagnosis first, prescription second.

Film with your phone from the entrance hole all the way in, talking as you go, and record one clip each of the internal sound and the external sound. Send them to us. If we need more after that, we will ask; you do not have to prepare everything at once. It is free.

Send us a video

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