What Do Diamondback Terrapins Eat? (Beginners Guide)

Terrapins are known for eating everything that you put in front of them. But this doesn’t mean that everything is good for them. There are certain ailments that should be avoided as much as possible. And some foods are better for a diamondback terrapin than others.

Diamondback terrapins are omnivores, which means that they will eat fruits, vegetables, as well as meat, and insects. A well-balanced diet for a pet diamondback terrapin will be mainly based on pellets, with the occasional fruits, vegetables, and dried insects.

But if you own a diamondback terrapin you can’t simply throw a random amount of food in the tank and let your terrapin eat as much as it needs. You have to be very exact with the amount of food and take into consideration that depending on the age of your terrapin its dietary needs will change. But before discussing how to feed your diamondback terrapin let’s first see what diamondback terrapins eat.

What Diamondback Terrapins Eat

Since diamondback terrapins are omnivorous they can eat a huge variety of ailments. So to make things simpler I will divide them into 5 categories:

Fruits
Vegetables
Meat
Processed food
Pellets

Fruits

Most fruits are good to eat, but there are some that aren’t good for terrapins due to the high amount of phosphorus or citric acid that they contain. Citric acid irritates the stomach of a terrapin, and phosphorus blocks the absorption of calcium shock is essential for a healthy bone structure and shell.

So here is a list of fruit that you should avoid:

Raisin
Prune
Date
Avocado
Guava
Banana
Coconut
Kivi
Persimmon
Cantaloupe
Apricot
Pomegranate
Honeydew
Nectarine
Mulberry
Peach
Orange
Lemon
Lime
Grapefruit

So if you don’t find fruit on this list, it’s good to eat.

If you want a more in-depth explanation about fruits and terrapins you can always check out my article: Can Terrapins Eat Fruits? (How Much, How Often + List)

Vegetables

Just like fruits, vegetables are great for terrapins, but there are some that contain a lot of phosphorus. Besides those other vegetables that you should avoid are iceberg salad, cucumbers, eggplants, and mushrooms. While those vegetables won’t harm your terrapin in any way, they also have little to no nutritional value for your terrapin.

Here is a list of some vegetables that contain a high amount of phosphorus, which you should avoid:

Corn
Tomatoes
Asparagus
Beets
Peppers
Pumpkin
Cauliflower
Brussels Sprouts
Carrots
Broccoli
Sweet potatoes
Green Beans
Squash
Romaine Lettuce
Turnips

So if you don’t find a vegetable on this list, it’s good to eat.

Meat

In general, all meat is good for terrapins, whether it comes from a cow, chicken, pig, or a fish. Just make sure that the meat doesn’t contain fat, and it doesn’t have any bones in it.

And for safety, you might want to cook the meat. Just make sure that you don’t add any condiments to it. While for us condiments add to the taste, terrapins make little to no difference in taste, and can actually harm them. So no salt, pepper, or any other kind of condiment on the meat.

Processed food

Processed food is bad for terrapins. So no kind of processed food for them. So no cheese, bread, pasta, salami, sausages, bacon, or chips.

Pellets

While pellets can be considered a type of processed food they are made especially for terrapins so they are ok.

But as you can imagine there can be some significant differences based on the brand of the food, so if you want to know which those differences are and which one is the best I would recommend you to check out this article where I and the rest of the members of Turtleowner.com, choose the best terrapin food on the market, based on our years of experience and a lot of research: Buyer’s Guide: Best Terrapin Food.

Now that we have covered what diamondback terrapins can eat we should also take a look at how to properly feed them since this is just as important.

How to Properly Feed Your Diamondback Terrapin

Over the years I’ve read about countless methods of feeding terrapins. But out of all of them, two stood out the most, being the most used and the most efficient. And they are the 15 minutes method and the size of the head method.

The 15 Minutes Method

The 15 minutes method is very simple, you give your terrapin a lot of food, and let it eat for 15 minutes. After that, you remove the food.

As simple as this method might be it’s definitely not the best one of the two. This is because diamondback terrapins, wild or pets, are opportunistic feeders by nature. This means that they will eat everything that they can in the fastest time possible because they don’t know when they will have the chance to eat again. Even if you feed them regularly they will not abandon this mentality.

While this is one of the most popular methods it’s starting to lose a lot of popularity lately due to its disadvantages.

One of its biggest disadvantages is that you can easily overfeed your terrapin, and this can lead to two serious problems, one is pyramiding, and the other is an unbalanced diet. Like all animals terrapins have their preferences, and if you present them with different types of food they will instantly go for the tastiest one each time, and the tastiest option doesn’t always contain all the necessary nutrients.

So, if you were to use this method your terrapin will definitely not be starving, but there is a good chance that you will be overfeeding your terrapin. This is why I would recommend you to use the size of the head method, which is just as easy to use, it’s just as efficient but has none of the disadvantages

The Size of the Head

This method says that you should feed your terrapin the same amount of food that it would take to fill its head (without the neck) if it were hollow.

The simplest way to put this method into practice is to find a small container, like a medicine cup, a shot glass, or a bottle cap. This container has to be approximately the same size as the head of your terrapin, without the neck. Then you fill that container to the top, and then you feed the food inside the container to your terrapin. And that’s all.

You don’t always have to use a container, you can always estimate the food that you would need to fill its head. If you sometimes give your terrapin a little too much food, and sometimes you give it a little too much, there won’t be any problem. Your terrapin won’t be affected by small differences.

This method does a great job because it takes into consideration the size of the terrapin, and gives you a fixed amount of food that you have to give your terrapin. And as the terrapin grows the amount of food will change.

This is the method I use to feed all my terrapins, and the results are great. During my research, a lot of people that used this method had great results, and nobody had any problem with it.

Between the two methods, I would definitely recommend you the size of the head method. Besides the reasons that I already listed, there is another important reason. It allows you to have a more diversified feeding schedule.

Diamondback Terrapin Feeding Schedule

The first thing that you have to take into consideration when thinking about how often you have to feed your terrapin, or when making a feeding schedule, is the age of the terrapin. Baby diamondback terrapins need a different amount of food than juveniles, and juveniles need a different amount of food than adult diamondback terrapins. So let’s take a look at each age group.

Feeding Schedule for Baby Diamondback Terrapins

Out of all the age groups, baby terrapins need to eat the most often. This is because they need a lot of energy to grow. When terrapins are at this stage in life they experience the fastest growth rate. And to be able to grow so fast they will need a lot of energy that they will get from eating.

So baby diamondback terrapins should be fed every day using the size of the head method.

Feeding Schedule for Juvenile Diamondback Terrapins

Terrapins grown from babies into juveniles. Diamondback terrapins usually become juveniles after they reach 3 to 4 inches, this usually happens when they are between 8 and 12 months old.

A juvenile won’t grow as fast as a baby terrapin, but it will still grow faster than an adult. So it still needs to be fed quite often. Here you have two good options.

You can either feed your diamondback terrapin once every two days, the amount of food that it will take to fill their head. Or you can feed them half of that amount every day.

There is no difference for them if you feed them every day, or if you feed them every two days, as long as the amount of food is right. So it’s up to you to choose which way you want to do it. I would recommend you to feed your juvenile diamondback terrapins every two days, this way the chances of you forgetting to feed your terrapin are smaller.

And if it ever happens that you forget to feed your terrapin once, don’t worry. In the wild diamondback terrapins can go weeks without eating. So your terrapin won’t be affected at all.

Feeding Schedule for Adult Diamondback Terrapins

Adult diamondback terrapins grow very slowly, and after some time they will not grow at all. So they won’t need as much food as babies and juveniles.

The best way to feed your adult diamondback terrapins is once every 3 days, using the size of the head method. This might seem enough food when you compare it to the rest of the age groups, but remember that due to the way the size of the head method works, the size of the food portion also increases so there is no problem, your terrapin is getting way more food than it got as a baby when it was eating daily.

Occasional Treats

Another thing that I want to address is that you can occasionally give your diamondback terrapin treats. As long as they are not too consistent, you can give your terrapin a few live fish, fruits, vegetables, or dried insects, without worrying that you disturb their feeding schedule.

Final Thoughts

While diamondback terrapins can eat a lot of things, not all of them can be good for them.

From my experience, I know that it’s not that easy to remember all the things that you should avoid, but as times go by you will memorize those things without even noticing. And in the meantime, you can always take another look at this article and check out the lists.

I hope that I managed to cover every possible aspect, but if you have any questions about what diamondback terrapins eat or anything else about terrapins don’t hesitate to ask in the comment section below. I will do my best to answer you as soon as possible.