First, the problem of drowsiness. Cats that are just bought are usually kittens. If yours happens to be a kitten, then sleepiness is normal. Just like a child, it sleeps every day when it is a baby. The same goes for kittens and puppies, so you Don’t worry too much. You should provide the cat with a clean, warm, comfortable and clean environment so that the cat can sleep well. Second, ear mites. If cats have ear mites, it is best to use topical medications, such as cleaning drops and ear oil. Sarkin’s used to have ear oil for cats, but they no longer sell it, which is a pity. The treatment of ear mites usually takes about a month. You should take the medicine according to the doctor's instructions and wait patiently. It is very important to ensure that the environment is clean, because what mites fear most is cleanliness. Third, there is the issue of anthelmintics. Personally, I think cats are so small that they can barely eat if they take anthelmintics orally to treat internal parasites. However, taking anthelmintics to repel mites is a bit unreliable, because the mites are under the surface of the cat’s body and are no longer in the body. The strong medicinal properties are more dangerous to cats. Deworming is generally preventive, so it is best not to inject or take medicines for cats. It is good to wear a cat collar, which is still sold by Sarkin's.