
Cats have different dietary requirements depending on their life stage, so it's important to transition your kitten to an adult cat diet at the right time and in the right way. Kitten food is designed to support rapid growth and development, but once they reach maturity, those extra calories can lead to weight gain. As cats grow, their nutritional needs change, so it's important to make the switch to adult cat food gradually to avoid upsetting their stomachs. In this article, we'll cover everything you need to know about changing your kitten's diet, including the best time to make the switch, how to do it gradually, and how to choose the right adult cat food for your feline friend.
| Characteristics | Values |
|---|---|
| Age | Kittens should transition to adult cat food around 12 months. |
| Weight | Adjustments to a cat's diet may be necessary if the cat is overweight or underweight. |
| Health | Food sensitivities may cause digestive issues, breathing problems, or itchy skin. |
| Diet Transition | The transition should be gradual over 7-14 days to avoid digestive issues such as vomiting and diarrhea. |
| Food Type | Adult cat food should be high in good-quality, animal-derived protein. |
| Food Formula | Specific formulas cater to neutered cats, senior cats, and cats with sensitive stomachs or skin. |
| Food Presentation | Cats prefer fresh food, and wet food should be served in small portions. |
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What You'll Learn
- Kittens should transition to adult cat food around the one-year mark
- Gradually transition to new food over seven to 14 days
- Observe your kitten for negative reactions, such as vomiting or diarrhoea
- Consult a veterinarian to ensure your kitten is healthy enough for a new diet
- Maintain a healthy adult body composition and body condition score

Kittens should transition to adult cat food around the one-year mark
Kittens have different nutritional needs than adult cats. Kitten food is designed to support their rapid growth and development, with higher calories and nutrients. It is generally recommended that kittens be fed kitten food until they are around 90% of their adult weight, which is usually around the one-year mark. At this point, they are at their full adult height and have some final filling out to do.
However, this timeline may vary depending on the breed of the cat. For larger breeds, like Maine Coons, the transition to adult cat food can be delayed until they are at least 18 months old since they take longer to reach maturity.
When transitioning to adult food, it is important to do so gradually over a period of about 7 to 14 days to avoid any digestive upset. Start by mixing three-quarters of the normal amount of kitten food with one-quarter of the new adult cat food for the first two days. For the next two days, serve equal amounts of kitten and adult cat food. Over the next few days, gradually increase the proportion of adult cat food while decreasing the amount of kitten food. By the tenth day, your kitten should be fully transitioned to the new adult cat food.
It is important to choose an adult cat food that provides the same high-quality nutrition as premium kitten food. A downgrade in food quality may upset your cat's digestive system and not provide them with the nutrition they need. Additionally, if your cat resists the new food or experiences tummy trouble, slow down the transition process and give them more time to adjust.
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Gradually transition to new food over seven to 14 days
When changing your kitten's diet, it's important to do it gradually to avoid upsetting their stomach. Kittens have different nutritional needs compared to adult cats, as they require nutrient-dense food to support their rapid growth and development. As they approach adulthood, their diet must change to meet the needs of their almost-adult bodies.
To smoothly transition to new food, it is recommended to do it over seven to 14 days. On the first day, start by mixing a small amount of the new food with their current food. For example, you can mix 1/4 of the new food with 3/4 of the old food. Over the next few days, gradually increase the proportion of new food while decreasing the old food. By days five and six, you can mix 3/4 new food with 1/4 old food. Finally, by day seven or 10, you can complete the transition to 100% new food.
It's important to monitor your kitten's behaviour and watch out for any negative reactions, such as tummy trouble or loss of appetite. If you notice any gastrointestinal symptoms like vomiting, diarrhoea, or decreased appetite, go back a day in the transition schedule. Remember, some cats can be very fussy about changes to their diet, so it's important to be patient and encouraging throughout the process.
Additionally, avoid giving your cat any treats or human food for at least six weeks while experimenting with a new diet. This will help you accurately assess their reaction to the new food. It may take up to 12 weeks to determine if the new diet is suitable for your kitten. If you have any concerns or if symptoms persist, consult your veterinarian for guidance.
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Observe your kitten for negative reactions, such as vomiting or diarrhoea
Vomiting and diarrhoea are common symptoms in cats that are not always a cause for concern. However, it is important to know when these symptoms indicate something more worrying. Observe your kitten's behaviour and watch out for negative reactions such as vomiting or diarrhoea. If your kitten is experiencing gastrointestinal symptoms such as vomiting or diarrhoea, it is recommended to go back one day in the transition schedule.
If your kitten is vomiting, it is best to miss their next meal. Then, feed them small amounts of bland, easily-digested food (such as boiled chicken or skinless and boneless white fish), gradually going back to their normal diet over a day or two. Young kittens should never skip a meal, so in these cases, it is best to go straight to feeding a bland diet little and often. Ensure your kitten is also getting the rest they need as they might need more sleep than usual. If your kitten seems lethargic, contact your vet.
If your kitten has diarrhoea, it could be a reaction to new foods or a sign of a more serious, underlying illness. Cow's milk is a common cause of diarrhoea in kittens because they cannot digest it. Food allergies, overfeeding, or eating inedible items can also cause diarrhoea in kittens. If your kitten has diarrhoea, it is important to keep an eye on their litter box. If your kitten has diarrhoea lasting longer than one to two weeks, or if there is weight loss or vomiting, your kitten should see a vet.
If your kitten is vomiting or has diarrhoea for longer than 24 hours, or if these symptoms are accompanied by other symptoms like tiredness, loss of appetite, collapse, or seizures, seek veterinary advice. Repeated episodes of vomiting or diarrhoea over a longer period may indicate an underlying health problem that needs treatment, so it's important to seek advice. Young kittens and senior cats are less able to cope with even mild cases of vomiting or diarrhoea and are more likely to rapidly develop complications from a simple upset stomach.
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Consult a veterinarian to ensure your kitten is healthy enough for a new diet
Before changing your kitten's diet, it is important to consult a veterinarian to ensure that your kitten is healthy enough for the new diet. This is especially important if your kitten has a medical condition or food sensitivity. The veterinarian can recommend the best food for your kitten's individual needs and rule out any underlying health problems.
Kittens have specific nutritional requirements that are different from those of adult cats, and their nutritional needs change as they grow. For example, kittens need more protein and calories to support their growth and development, while adult cats require less. Senior cats have different nutritional needs again, such as supplements to support joint health.
When transitioning your kitten to a new diet, it is important to do so gradually. Abrupt changes can lead to digestive issues such as vomiting or diarrhoea. Over a period of seven to 14 days, you should gradually decrease the amount of old food while increasing the amount of new food. It is also important to monitor your kitten's behaviour and watch for any negative reactions during this time.
If you are considering a raw diet for your kitten, it is important to speak to your veterinarian beforehand. While a raw diet can provide all the necessary nutrients, it also increases the risk of certain diseases, some of which can be transmitted to humans. Commercially prepared raw diets are available, and your veterinarian can guide you in choosing a safe and healthy option.
Additionally, if your kitten is showing signs of weight gain or loss, it is important to have them evaluated by a veterinarian. They can help you determine if a change in diet is necessary and recommend specific cat products and foods to support your kitten's health.
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Maintain a healthy adult body composition and body condition score
Cats' nutritional needs evolve as they grow older. Kitten food is usually higher in calories and nutrients to support their growth and development. However, once they become adults, these extra calories can lead to weight gain. Therefore, it is recommended to transition kittens to adult cat food around the one-year mark.
To maintain a healthy adult body composition and body condition score, it is important to understand what an ideal body condition score looks like. The Body Condition Score (BCS) is a tool used to assess a cat's overall health and body fat levels. It involves evaluating the cat's body from above and the side to determine whether they are an ideal weight. The BCS typically uses a 9-point scale, ranging from 1 (severely underweight) to 9 (severely obese), with an ideal body condition falling between 4 and 5.
To assess whether a cat is within the ideal range, you can look for the following characteristics:
- The ribs can be easily felt with a gentle touch but are not prominent and are covered with a thin layer of fat.
- The spine and hip bones are detectable but covered with a moderate layer of fat.
- There is a visible waist when viewed from above, with a slight abdominal tuck.
- The abdomen shows a gradual upward slope from the rib cage to the hind legs when viewed from the side.
It is important to regularly monitor your cat's body condition and weight to identify any noticeable changes. This can be done through routine body condition assessments, which can be adapted to the cat's preferred position, and gentle, soothing touches. Additionally, regular exercise and good feeding habits can help maintain a healthy weight. If you suspect your cat is gaining or losing weight unintentionally, it is best to consult a veterinarian for advice.
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Frequently asked questions
Kittens can keep eating kitten food until they are almost full-grown, usually around 10 to 12 months old. For larger breeds, like Maine Coons, kittens can keep eating kitten food until they are around 1.5 to 2 years old. Transitioning to adult cat food should be done gradually over seven to 14 days.
Abrupt changes in diet can lead to digestive upset, vomiting, and diarrhea. If your kitten is experiencing gastrointestinal symptoms (soft stools, vomiting, or a decrease in appetite), go back one day in the transition schedule.
Cats' nutritional needs change as they grow. Kittens need lots of protein, but adult cats need less. Senior cats may benefit from a diet with added supplements, such as glucosamine and chondroitin, to support joint health. Other reasons to change your kitten's diet include food sensitivities, weight management, and excessive hairballs. Always consult your veterinarian before making any changes to your kitten's diet.
There are a few ways to make the transition to a new diet easier for your kitten. Firstly, slowly introduce a tiny amount of the new food in a dish close to your kitten's usual food bowl. Once your kitten is happily trying the new food, you can gradually increase the amount of new food while reducing the old food over a period of seven to 14 days. Avoid giving your kitten any treats or human food for at least six weeks while experimenting with a new diet.










































