5 Tips to Fatten Up Your Dog: Weight gain

skinny dog

If your dog is underweight, it is important that you do everything possible to fatten it up.

Dogs that are too skinny are prone to all sorts of health problems. Fortunately, there are a number of ways to get your canine companion up to a normal weight.

Why is my Dog Underweight?

There are a variety of reasons that your dog could be a little too skinny, and it is important that you are aware of them.

They Don’t Like Their Food

It is possible that your dog is underweight because it just doesn’t like the taste of its food. Some dogs are pickier than others when it comes to what they will eat. Check out our article about the best and the tastiest dog food.


There is also a possibility that your dog is not at a healthy weight because it is sick. Any number of health issues could be causing them to lose weight rapidly. It is important that you take them to the vet to get looked at right away.


If your dog is experiencing high levels of stress, they might not be eating normally. This can cause them to become significantly underweight. There are lots of different things that can cause stress in dogs, such as a sudden change of residence. A lot of dogs get stressed out when they are left alone for long periods of time.

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How do I know if my Dog Is Underweight?

It is usually pretty easy to tell if a dog is underweight, especially if you can see its ribs. There are a few factors that you’ll want to take into consideration, such as the breed of the dog. Some breeds are slimmer than others. For example, it is fairly normal to see the ribs of a Greyhound, as this is just the way they are built. You also need to consider the activity level of your dog.

If you have any doubts regarding your dog’s weight, you can always consult with your veterinarian. They will be able to tell you if your dog is currently at a healthy weight. This is by far the most definitive way of determining this.

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How to Fatten up Your Dog

1. Switch to Another Dog Food

If you are trying to get your dog to gain weight, you’ll want to consider switching to a food that is calorically dense. There are a lot of these options available on the market, so you’ll want to be careful about what you buy. 

Take the time to find a food that will help your dog gain weight while keeping them as healthy as possible. It should have all of the nutrients their body needs on a daily basis. You should also look for foods that are packed with protein, as they encourage the growth of lean muscle. This can also help your dog gain weight quickly.

When you are switching your dog to a new food, you should keep about ten percent of the old food in their bowl to start. This should make transitioning to the new food at least a little bit easier for your pooch.

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2. Try Changing Your Dog’s Feeding Schedule

It’s also a good idea to try changing your dog’s feeding schedule to see if they gain weight any faster. Give your dog a small amount of food at the beginning of the day, and a larger amount in the evening. This could make a big difference when it comes to how quickly they put on the pounds. 

Eating before going to sleep encourages weight gain in humans, and it is likely to have the same effect on dogs. You should also give them a small amount of food somewhere in between the morning and evening. There is a very good chance that this will help your dog’s weight increase noticeably.

3. Special Treats

There are some treats that you can give your dog to help them gain weight. You can buy special treats that are designed for this purpose. It’s also recommended that you give your dog a little bit of all-natural peanut butter in their bowl each day. This can really help with bulking them quickly, and it’s not bad for their health at all.

skinny old dog

4. Take Your Dog Out More

The more exercise your canine companion gets, the more muscle they will build. This can do wonders for getting your dog to put on weight. This could mean just taking them out for an extra walk each day. You might be surprised at just how much faster they will bulk up when doing this.

5. Explore Supplement Options

With all of the supplements that exist specifically for dogs, it is important that you take some time to explore your options. You will be able to find numerous supplements that are designed for helping dogs to gain weight. 

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Just make sure that you have done your research before settling on anything in particular. You need to make sure that the supplement you give your dog each day is not going to harm them at all. The internet is a great resource when it comes to doing this research.


  • There are many reasons that your dog could be underweight, such as stress, not liking their food, or even illness.
  • Some dog breeds are naturally skinnier than others, so you’ll need to consider your breed when determining if they are underweight.
  • If you aren’t sure if your dog is at a healthy weight, you can always consult with your vet.
  • The first thing you should try to is to give your dog a new calorie-dense food to encourage weight gain.
  • When you switch your dog to a new food, keep a little bit of the old food in the bowl for the first day or two until it adjusts.
  • You should also consider breaking your dog’s meals up into three separate times each day, with the biggest portion at night.
  • There are also special treats that are designed to help dogs gain weight.
  • An increase in daily exercise can also help bulk your dog up fairly quickly.