Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to deal with a snoring cat [title] Note how frequently they snore. [step] Like humans, cats enter deep, rem (rapid eye movement) sleep. When they do so, they are more likely to snore because their bodies are the most relaxed.

Ending1: This means that often they wake without using any voice or body language at all and will get back to sleep within about 4 to 8 hours. This is because they are aware that movement is a critical part of their sleep cycle. Ending2: If your cat only seems to snore very occasionally, they're likely snoring during their deepest sleep, which is not dangerous. [substeps] If your cat has physical or behavioral changes along with snoring, you need to have it examined by a veterinarian as soon as possible. Ending3: Over time, this is usually due to inflammation of the brain's vascular systems and a lack of a clear sense of wake. [substeps] They sometimes let themselves " wake up " by nuzzling the television or watching videos. Ending4: [title] Be aware of the type of sleeping pattern you generally sleep. [step] They may sleep at night or some of the time.

Answer format: ending1/ending2/ending3/ending4