If you're standing out in the barn with a sick doe and trying to figure out how much LA200 to give a goat, you probably just want a straight answer so you can get her treated and back on her feet. Dosing livestock can feel like a high-stakes math test, especially when you're dealing with an animal that's acting miserable. The short answer that most goat owners and vets land on is 1 ml per 20 pounds of body weight, but there's a little more to it than just drawing a line on a syringe.
Goats are notoriously finicky when it comes to medicine. Unlike cattle, for which LA200 (oxytetracycline) was originally designed, goats have a lightning-fast metabolism. They burn through calories, water, and unfortunately, medication much faster than a cow does. Because of this, the "label dose" you see on the bottle—which is usually intended for beef cattle or swine—often isn't quite enough to knock out a stubborn infection in a goat.
Doing the math without a headache
When you're trying to calculate the dose, you first need a solid estimate of what the goat actually weighs. If you have a scale, use it. If you don't, grab a weight tape or even a piece of string and a measuring tape to get a "guesstimate" based on their heart girth. Being off by 20 pounds can mean the difference between the medicine working and just wasting your time.
Most experienced goat keepers use a dosage of 5 ml per 100 pounds. If you break that down into smaller increments, it looks like this:
- 10 lbs: 0.5 ml
- 20 lbs: 1.0 ml
- 40 lbs: 2.0 ml
- 60 lbs: 3.0 ml
- 80 lbs: 4.0 ml
- 100 lbs: 5.0 ml
It's a pretty simple 1-to-20 ratio. If you've got a massive Boer buck that weighs 200 pounds, you're looking at 10 ml of fluid. That's a lot of medicine to push through a needle, especially considering how much this stuff stings.
Why LA200 is both great and a bummer
LA200 is a broad-spectrum antibiotic, which is fancy talk for "it kills a lot of different types of bad bugs." It's most commonly used for things like pneumonia, pinkeye, and foot rot. The "LA" stands for long-acting, meaning the medicine is suspended in a carrier that releases slowly into the goat's system over about three days.
The "bummer" part? It's thick, it's oily, and it hurts like crazy. If you've ever had a shot that felt like fire going into your arm, that's exactly what the goat is feeling. This is why you'll see some goats start limping or screaming the second the plunger goes down. Don't panic—they aren't dying; they're just letting you know they aren't fans of your medical expertise.
Because it's so thick, you really can't use a tiny needle. If you try to use a 22-gauge needle (the kind often used for vaccines), you'll be pushing against that plunger forever, and the goat will lose its patience long before the syringe is empty. An 18 or 20-gauge needle is usually the sweet spot. It's big enough for the thick liquid to flow but not so big that it feels like you're stabbing them with a harpoon.
Subcutaneous vs. Intramuscular
There is a long-standing debate in the goat world about where to put the needle. The bottle might say "Intramuscular" (IM), which means into the muscle. However, most modern goat experts and vets recommend giving LA200 Subcutaneously (SQ), which means just under the skin.
Why? Because giving this specific medication into the muscle can cause some pretty nasty tissue damage. It can create "meat spots" or abscesses in the muscle that take a long time to heal. If you're raising goats for meat, that's a big "no-no" for carcass quality. If they are just pets or milkers, it's still better to go under the skin because it's generally less painful.
To give an SQ shot, you just "tent" the skin—usually on the neck or just behind the front shoulder—and slide the needle into that little pocket between the skin and the muscle. Just make sure you aren't poking all the way through and shooting the meds out the other side into their hair. I've done it; it's an expensive mistake.
Timing and frequency
One of the biggest mistakes people make when learning how much LA200 to give a goat is giving it every single day. Remember, the "LA" means long-acting. If you give it on Monday, it's still working on Tuesday and Wednesday. Most treatment plans involve one dose every 48 to 72 hours.
If the goat is really struggling with something like severe pneumonia, your vet might tell you to hit them again at the 48-hour mark. If they are just slightly under the weather, 72 hours is usually the standard. Always finish the course, though. If you stop after one shot just because they look better, the bacteria might come back even stronger and more resistant to the meds. Usually, two or three doses over the span of a week is what it takes to clear things up.
The withdrawal period
This is the part that isn't very fun for those of us who like goat milk in our coffee. Since LA200 is an antibiotic, it stays in the animal's system for a while. You cannot use the milk or meat from a treated goat until the withdrawal period has passed.
For meat goats, the standard withdrawal is usually around 28 days. For milk, it's a bit of a gray area because LA200 isn't technically "labeled" for use in lactating dairy goats by the FDA. This makes it "off-label" use. Most vets suggest a milk withdrawal of anywhere from 10 to 14 days after the last injection, but you really should check with a professional to be safe. You don't want to be drinking tetracycline with your cereal.
When to call the vet
I know, I know—vets are expensive. But sometimes, LA200 just won't cut it. If you've given a dose and 24 hours later the goat is still running a high fever (anything over 103.5°F) or if they've stopped eating and drinking entirely, it's time to call in the pros.
Also, keep in mind that LA200 can be hard on the gut. Antibiotics don't know the difference between "bad" bacteria causing pneumonia and "good" bacteria that helps the goat digest its hay. Whenever you're giving antibiotics, it's a smart move to give the goat some probiotic paste or some fortified yogurt a few hours after the shot. It helps keep their rumen moving so they don't go off their feed.
A quick safety note
Never give LA200 to a pregnant doe unless it's absolutely necessary and your vet says it's okay. Tetracyclines can sometimes interfere with bone and tooth development in the unborn kids. It's one of those "risk vs. reward" situations. If the mom is going to die without it, you give it. If it can wait, wait.
Also, watch out for the sun. Oddly enough, oxytetracycline can make goats (and people) photosensitive. If you have a white-haired goat, they might get a nasty sunburn more easily while they're on this medication. Keeping them in a shaded pen for a few days isn't a bad idea.
At the end of the day, knowing how much LA200 to give a goat is just one part of being a good goat parent. Keep your math simple, keep your needles sharp, and always keep a close eye on them after the injection. They might be mad at you for a few minutes because of the sting, but they'll be much happier once that infection clears up and they can get back to doing what goats do best—getting into things they shouldn't.