Perhaps the dog in your life is a bit naughty, he doesn't mind you when you tell him to do something.
Are you looking for a way to correct this bad behavior? A dog training collar of some sort could be the answer to your problem.
They come in lots of different types.
There are martingdale collars, sort of choke chain idea without the chain, they tighten up a bit if the dog pulls too much.
There are collars that operate with a remote control device which gives a combination of sound and vibration/shock correction.
These usually have a large number of settings of sound and vibration so between the two you have a huge number of correction options.
If your pet is a nightmare to take for walks because he chases cats, other dogs, people, cars in fact everything and anything that moves then he definitely needs training.
Walking a dog like that is exhausting and quite honestly I don't believe the dog gets a great deal out of it when you are constantly having to reprimand him.
Do you know your dog's breed for sure? Perhaps he is purebred and in this case there will be no question about it, but if he is a mix, do you know a mix of what? Do you know that it is possible to get a DNA test done on your dog, taking about a week to process, which will tell you just what breeds are in your dog.
This could be a great help to you to know what type of training system would suit the dog best.
Maybe you have a gun dog who you need for retrieval when you have been shooting.
This type of dog has to be well under control.
These combination sound and vibration collars are usually completely waterproof so that is good news for dogs that need to be in water from time to time.
If your pet problem is that the dog pulls hard when walking there is another revolutionary looking dog training collar that I have just discovered.
This consists of a portion of lead which goes over the nose of the dog and joins under the chin to another section which adjoins the lead but behind the head, not the neck.
Vets, trainers and people like the RSPCA all think that this dogs react quicker to this type of corrective leash than other types of dog training collars.
As with any product there is a huge range of these collars to choose from.
You just have to decide which aspect of the dog's behavior you want to change then start your search.