[DOSAGE] La 200 for Chickens for CRD Treatment with VetRx

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La 200 for chickens is used in the treatment of CRD (Chronic Respiratory Disease) aka Mycroplasma gallisepticum. This infection is not harmful to humans.

it is most often introduced through wild birds in the area. If you free range or have fencing that allows for small birds like the gold finch and swallows you are running a higher risk.

There is no cure, only treatment. Although, Breeders and longtime chicken keepers would cull, of course. But, if there is a chance to keep your babies alive, I believe you should take it, right?

Now, once a bird is infected in your flock then they would become carrier for life and pass it to all birds that are with and through their eggs. Again, THERE IS NO CURE, ONLY TREATMENT.

Remember: You cannot breed birds that have CRD if u don’t want your chicks to have it

la 200 for Chickens Dosage with VetRx

The correct dosage for LA-200 to treat gasping, congestion, gurgling, and other symptoms of CRD is to use .20 CC per pound (5lb chicken= 1CC.).

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You should carefully inject into breast approximately 1/4 inch deep ONCE. DO NOT INJECT ANOTHER DOSE UNTIL DAY 3!

This is a broad-spectrum antibiotic that does not begin to dissipate until day 3. On the first, second, and third day, you should rub VetRx onto their nostrils and combs and add 1 ounce of VetRx to 1 gallon of their water which has to be “faucet hot” to be able to mix with the water.

On the third day, provide another dose of LA-200 according to the dosage above and do not give anymore!

Instead, use VetRx from day 3-6 both topically and in their water supply. Lastly, keep them warm by placing a heat lamp on them and keep them out of the wind.

On the 7th day you should have healthy chickens. Yay!

Try it and do let us know what you think. It should work for you if your precisely follow these instructions.

Side note: My friend, Emma added Nubiotics oregano oil to the water for hers and it better helps them.

UPDATE (20/10/21): While the information posted above is correct (and will work). We have further made the information better.

So, the advised dose of LA 200 in poultry is 25-40 mg/kg once a day. Given that LA 200 contains 200mg per ml that would mean around 0.06 ml to 0.09ml per pound of weight a day.

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That means, a 5 pound chicken would get anywhere from 0.3ml to 0.04ml a day.

Note: LA 200 can trigger muscle site necrosis so it may be in your birds best interested if you administer it orally.

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La 200 for Chickens dosage


Causes of CRD in Poultry

  • viruses,
  • bacteria,
  • fungi, and parasites.

CRD in Chickens Symptoms

When breathing, you’d notice signs like:

  • Sneezing
  • Rales
  • coughing, tail bobbing when breathing, emaciation
  • open mouth breathing,
  • poor growth,
  • decreased feed consumption,
  • lowered egg production and shell quality.

LA-200 for Chickens Egg Withdrawal

Sadly, your birds will carry this disease for life and although it is not harmful to humans – you should not breed from your sickly infected flock to SELL TO OTHERS!


Lastly, these diseases are also chronic- meaning that the symptoms can go away, but then come back anytime, especially if stressed. Some of these respiratory diseases can also be passed from the infected parents to the offspring vertically through the egg to the developing embryo, making many chicks that happen to hatch, already infected with the disease.

Can You Give La 200 orally to Chickens?

Yes you can. It’s really not that hard to give a shot. Just don’t give it in the same spot. Rotate sides. You can aspirate a chicken if given orally and is not done correctly.

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How to Get Rid of CRD in Chickens

  • Use La 200 to treat your chickens following our instructions above
  • During winter, keep your hens in a draft free environment. If it’s really that bad outside, then you need to bring them inside for some time.
  • Keep them away from grass or puddles.
  • Avoid feeding natural sugars during these periods. You should limit corn feeding since corn turns to sugar which feeds the fungal/bacteria so a little corn is fine.
  • Keep an eye on them and clean around their head with antibacterial. I sometimes use a paper towel with alcohol to prevent them from getting wet since its winter.
  • Once your bird feels better, take out all laying materials and spray with either Clorox or Oxine solution (floors, walls) & anywhere where they may have gathered when they were roaming your yards to try and eliminate as much bacteria as you can. Let them dry and place new bedding.

But enough with the treatment in the UK, US & Canada. How about in African countries, like Nigeria?

CRD Medicine for poultry in Nigeria

You can use 20% enroflaxocin which is a mega anti-microbial. You pulse dose them by providing them the dosage they are to consume in a day in 20-40% od the total water they consume in a day.

Others use NCO and Tylosin based drugs.

Author: Howard S. Baldwin

My name is Howard S. Baldwin. I am a work-at-home dad to three lovely girls, Jane + Hannah + Beauty. I have been blogging for the last 3 years. I worked for other Home and Lifetsyle blogs, did hundreds of product reviews and buyers’ guides. Prior to that, I was a staff accountant at a big accounting firm. Needless to say, researching and numbers are my passion. My goal is to be an informative source for any topic that relates to DIY life and homemaking.

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