If you have a litter of young rabbits, it's important to be aware they can start breeding from as young as 12 weeks. This means that it's important to separate the rabbits into same sex groups before or around 3 months of age. It can be difficult to find the sex of a rabbit that is a few days old. You can attempt it at a younger age, but to definitively find the sex of your rabbits, wait until they are at least 4 weeks old. If you are not used to finding the sex of rabbits, it's best to start with an adult. If you have the parents of a litter of rabbits, you can take a look at the anatomy of the mother and father rabbit. This will help you see what a fully developed rabbit looks like. If you are still not confident, you can ask your veterinary clinic for help. Take your rabbits to your local veterinarian for help if necessary. Pick a rabbit to start with. Like most mammals, the rabbit's genitals are between its back legs. To see this area, the rabbit needs to lie on its back. It is helpful to have an extra person around to hold the rabbit so you have both hands free. Get your helper to sit in a chair and cover her lap with a towel. This is in case the rabbit urinates.  Tell her to use one hand to grasp the rabbit's scruff and use her other hand to scoop under his rump. She should then lift and turn the rabbit onto his back. Lay the rabbit with his head towards her stomach and tail on the edge of her knees. This will give you easy access to the genital area.  You may want to wear gloves since you are going to be touching a rabbit's genital regions. It is more hygienic as well as safer. You may unintentionally spread the disease to the rabbit or to your other rabbits if you don't. If you are checking a rabbit by yourself, flip the rabbit onto his back. To do this, place your index finger between the rabbit's ears and grasp the base of the head with your thumb on one side and your other three fingers on the other. With your other hand, cradle the rump and scoop the rabbit up.  Once you have flipped your rabbit,...

TL;DR in Vietnamese:
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