Most people look at dogs with wagging tails and assume they're happy.

However, an expert has revealed why this isn't always the case. A trainer at the Howl School for Dogs, located in the North East of England, shared her knowledge in a TikTok video.

She told her 25,800 followers: "A wagging tail on a dog doesn't necessarily mean they're happy. A wagging tail just means they are in a state of arousal.

"They might be excited, they might be stressed, they might be worried, they might be anxious. There can be a lot of big feelings going on there but it doesn't always mean happy. I think that's a common misconception."

The trainer explained that it's important to read the cues that pets are providing you. Failing to interpret your dogs boundaries correctly can have negative consequences.

She continued: "It can be why dogs often resort to having to increase their aggressive communication or behaviour – because people are misunderstanding their communication. You need to look at the other body language that is going on alongside that wagging tail."

So what signs should you be looking for? According to the expert, you should look at your pet's posture, facial expression, body language and behaviour.

She explained: "If they're wagging their tail and their face is quite tight, they've got ridges and lines around their face, if their eyes are a bit tight or squinty, or their ears are back, are they holding their head quite low, look into lots of these different body languages.

"Are they yawning a lot? Are they doing a few shake-offs? Are they turning their head away? Look at the big picture that's going on.

"Don't jut see wagging tail and assume 'oh, they're happy!". That's not always the case."

The clip has garnered hundreds of views since it was posted – and many found the advice helpful. One commenter replied: "Sending this to my family before they visit for Christmas because I knew this but you put it so well!"

Another said: "Thanks for clarity, makes sense." And a third added: "I think we tend to oversimplify animals body language, like we all know people can smile for other reasons than joy."

To sum everything up, get to know your pet and don't just rely on assumption. Taking a look at your pooch's entire body language can make all the difference when it comes to how you interact.

And if you're looking for more dog tips, we've got you covered. A vet recently revealed the common mistakes people are making with their furry friends.

Meanwhile, a dog trainer shared the three breeds he'd never want to own. Some of them may surprise you.