This is what we usually think of when someone mentions a harness. It's a normal style, especially useful for small dogs or cats. My dog Lucy was twelve pounds and when I walked her on leash I wanted to avoid applying too much pressure to her throat. She wore a harness like this one and loved it.

A slight variation and good for larger dogs is the step in harness. It is easy to put on. Generally, you lay the harness on the floor, have the dog step into the leg holes and clip it together. Easy and again it keeps the pressure off the dog's throat. It does not, however, give the control you might need if the dog doesn't walk nicely on a leash. If you have a dog that pulls, this might not be for you.

The manufacturers recently have come out with some little vest style harnesses. These are cute for small dogs, but they also serve an important purpose. If your dog is very small, has been sick or has had an injury, these harnesses distribute the pressure away from the neck and shoulders.

They come in many colors and styles and are a good choice for some dogs as well as being unbearably cute.

This is a step in variety of the vest harness.
There are other harnesses designed for specific purposes. Years ago we bought car harnesses from AAA. They did the job, but had some minor flaws.
Morgan was kind enough to model this one for you. The harness fit well and had a padded chest but it had this flap on the back for the seatbelt to go thru. That was OK, but when you got to your destination, you had to either remove the harness or figure out how to attach a leash to this flap. It didn't work very well for walking as the flap got twisted.
They made the changes and this is the newer version of the Easy Rider car harness. Fudge is the model because Morgan got tired of it. They replaced the flap with a metal ring. Good thinking. Now you simply attach the leash to the ring and you don't have to fumble getting the harness off and back on again.
The best change was making this strap that hooks on the harness ring and the other end slides into the seatbelt lock. Quick and easy and it works.

This is how the system looks in use.

If you have a big dog that pulls there are a number of harnesses made to address that situation. The one we like best is the Easy Walker. It has the leash ring in the front so if the dog tries to pull, his head and shoulders swing toward you. At the same time it applies a little pressure behind his front legs.
I have two pullers, Samba and Morgan and this is the only harness I have found that really works on both of them.

The Easy Walker is not for running with your dog or for long hikes. It can chafe the front legs if used for those situations, but for normal walks, it works. My only complaint about it is that I find it difficult to put on the dog.
Some people love the Gentle Leader or the Halti Head Harnesses. They work on the principle that where the head goes, the body will follow. I tried one with Monty and he hated it. He got very good at pushing it off with his foot. I didn't like it because I like my dogs to have more freedom than it allows. Still, for some dogs it's the answer.We all know there are special harnesses for sled dogs and there are harnesses with attached saddle bags for hiking with your dog, but there are others you may not have come across.
Morgan is wearing a water harness. It's made for dogs that work in the water. It has padding on the chest and around the legs and it has a handle on the back for helping the dog into the boat.

This harness is for helping dogs that have injuries to their backs or back legs. Often as dogs age they have arthritis in those areas and this is a way to give them some support on steps or getting up and down. We used something similar to this for Bentley who was badly crippled with arthritis in his last years.

This is a special harness made for dogs with injuries to the back or legs. It has lots of padding and numerous support straps.
The harness makers have come a long way in recent years in addressing the varied situations that pet owners face. If you're thinking of getting a harness, think about what you need it to do and do your homework online. There is probably a harness avavilable that will work for you and your pet.

