Dogs are man's best friend for a reason, and there is little we wouldn't do for our four-legged family members. However, sometimes it can be hard to know when they need to see a vet because they can't tell us when they are sick. If you're concerned about taking care of your dog, here are seven signs to keep in mind that mean they need to see a vet.

1.Their Eating Habits Have Changed

Changes in the way your dog eats are a sign that something may be wrong. If they are suddenly not eating food that they previously loved, it could be a sign that they are having some digestive issues that a veterinarian will need to diagnose. The best-case scenario is that they have an upset stomach. However, this could also be a sign of something more significant such as an intestinal obstruction.

2. Drinking Too Much or Too Little

Suddenly, drinking less water can also be a sign that there are digestive issues that our vet will need to take a look at. However, if your dog suddenly starts drinking more or urinating more, your veterinarian should check your dog for kidney problems or diabetes, as both can cause increased drinking and urinating.

3. Trouble Breathing or Rapid Breathing

Many dogs pant when they get hot, but when they get overheated, their breathing could increase rapidly as they try to cool themselves off. The average temperature of a dog is between 101 and 102.5 degrees, and if you're afraid your dog is overheating, you should bring them into a cool area and call your vet immediately.

Similarly, difficulty breathing could signify that your dog is experiencing a cold or some kind of allergy. Your veterinarian will be able to diagnose the exact problem so that your pooch can get the treatment they need.

4. Lethargy

If your usually energetic pup is suddenly lethargic, you'll want to have your vet give them a look. This could be a sign that something is hurting them or that they aren't feeling their best. While it would be easier if they could simply tell us, unfortunately, they'll have to see a vet.

5. Irritated Eyes

If your dog's eyes are suddenly red, irritated, or producing extra mucus, you'll need to get them checked out by your vet. While it may be irritation from an allergy or something that got into their eye, they could also have a scratch or injury to their cornea which will require a vet to diagnose.

6. Rashes, Skin Irritation, Changes in Their Fur

In many cases, rashes and changes in fur can be attributed to allergies or your dog's diet. If your dog is itching excessively, you'll want them to see a vet as soon as possible. Your vet can help determine what is causing these changes and advise the best way you can help make your dog feel more comfortable again.

7. Aggressive Behavior

Lastly, if your usually sweet and affectionate dog is suddenly acting aggressively, this is an indication that something isn't right. Just as some people get short-tempered when they aren't feeling good, so too can a dog sometimes lash out when they are sick or injured. Don't just assume that your dog has developed behavioral problems, and instead have them examined by your vet so that any injuries or illnesses can be diagnosed and treated.

Dogs are more than just pets, they are part of the family. Because of this, it is important to know some of the most common signs that your dog needs medical treatment. Keep these signs in mind so that you can know when your dog needs to see the vet so that you can keep your best friend happy and healthy for years to come.