# How much antibiotics?

I want to medicate 400 10 day old chicks. The antibiotics dosage is 40mg per kg of body mass. For 1-19 day Olds dosage is 0.1g of antibiotics per 1 litre of water.

How much antibiotic do I use in grams?

### 2 Answers

- DixonLv 71 month ago
Weigh a few chicks in kg to get a typical mass, then multiply by 400 to get the approximate total mass of all the chicks.

Multiply that by 0.4 to get the liters of water needed.

Multiply the liters of water by 0.1 to get the grams of antibiotic.

# # # # # # #

WORKING:

Antibiotics @ 0.040 g per kg of body mass

Antibiotics @ 0.1 g per 1 litre of water

0.040/0.1 = 0.4 liters of water per kg of chicks.

EXAMPLE:

Assume 0.5 kg chicks (total guess on my part)

Total mass of chicks is 0.5 x 400 = 200 kg

Total amount of water is 0.4 x 200 = 80 liters

Antibiotic = 0.1 x 80 = 8 grams

CHECK:

One chick gets 8/400 grams = 0.02 grams = 20 mg of antibiotic.

If a chick is half a kg (500g) then at 40 mg per kg, this is the correct dosage.

8 grams of antibiotic in 80 liters of water is

8/80 = 0.1 grams of antibiotic per liter of water, which is correct.

- MorningfoxLv 71 month ago
How many liters of water to the chicks need, per day? Just put in 0.1 grams for each liter.