If you notice that your cat does not want to eat or simply does not have an appetite as before, this may be one of the reasons I will list. In some cases, it is not dangerous at all but very often it will require your full attention.
If your cat has trouble breathing, it can greatly affect her appetite. How? Very often, when a cat has trouble breathing, it also has problems with its sense of smell which automatically leads to a weaker appetite. As you probably know, it is very important for cats not to have problems with their sense of smell because it is their way of choosing the food they will eat and determining if it is food for them. Either way, respiratory problems can be solved with antibiotics, but they can also be the result of something complicated like cancer. If you notice that your cat has suddenly lost her appetite, you should probably visit a vet.
2.Digestive System Issues
Your cat may stop eating if it has problems with its stomach, intestines, pancreas, or other digestive organs. Along with digestion problems, your cat may vomit, have diarrhea, or have belly pain. However, a loss of appetite is usually one of the earliest indicators of digestive system disease. Acid reflux, tumors, an imbalance of gut bacteria, parasites, irritable bowel illness, and other issues are all possibilities.
3. Dental Problems
Painful teeth are a problem for all living things, both us and cats. If you have problems with toothache, you will eat carefully, and eat less because you do not want to suffer pain. It's the same with cats. If they have sore teeth, of course, they will not want to eat to avoid pain. Painful teeth in cats can come from many reasons such as cracked teeth, swollen or inflamed gums, or the formation of dental abscesses. When it comes to this problem, it is very difficult to detect and you would have to visit a vet, and he would probably have to sedate your cat in order to be able to do a detailed examination.
4. Food Flavor
Cats may be finicky. Some will eat a certain flavor of food for months or even years before deciding they no longer want to eat it. This is normally a matter of personal preference, but food manufacturers occasionally change flavors and ingredients without warning, and your cat will notice and revolt.
5. Food Contamination
It's possible that if you offer your cat outdated or rotten food, it will refuse to consume it. Check the food's expiration date. Alternatively, give it a sniff to see whether it smells rancid.
Finally, some words of wisdom:
Keep food in it's original bag. If food isn't stored properly, vitamins and fats might erode. Place the original bag in a sealed container in a cool, moisture-free location to guarantee the food's freshness.
Vitamin B12 should be given to your cat. In a cat with a digestive problem, this vitamin is frequently low. Your veterinarian may offer over-the-counter, cat-specific oral versions as well as injections. It's a harmless water-soluble vitamin that has the ability to make your cat eat more.