The myth that dogs are colourblind has been circulating for many years. The truth is that dogs dont just see in simple black, grey and white. In fact they have no problem seeing a list of other colours from yellow to violet. What they do have difficulty seeing is hues of red, green and orange.

Dogs eyes have something called photoreceptors in their retinas. These are divided into two categories rods and cones. Dog's eyes have a high number of rods. Comparatively, human eyes have a high level of cones. They are also missing the fovea seen in human eyes, preventing their vision from being as clear.

Despite this and their inability to see objects in great details, dogs have excellent night vision and a superior ability to track movement.

So, how was it discovered that dogs see in limited colours? Around 100 years ago tests were carried out (purporting to be scientific) to determine just what sorts of colours dogs were able to see. However, the actual tests that were carried out did not help to determine the range of colours that dogs could see, but rather they showed that colour vision does not play a part in a dogs daily life.

It was another 90 years before further tests were carried out to determine whether dogs are colourblind or not. In 1989 the three researchers Neitz, Geist and Jacobs carried out a number of tests on domestic dogs and were able to determine the following. 1 Dogs have two kinds of colour receptors in their eyes and so are dichromatic. 2 In dog's colour receptors, one peaks for the blue to violet range and the other for the yellow to green range. In 1993 and 1995 further research was carried out that again supported these findings.

Dogs in fact suffer from a form of green colour blindness similar to human red-green colour blindness. This particular illness is more commonly referred to as deuteranopia.

The term colourblind can often be misleading. It does not automatically suggest an incapability to see colours. It is a specific condition that some humans are also known to suffer from and though dogs are not capable of seeing a similar level of colours as humans, they can see shades that fall between blue, violet and yellow.

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categories: pets,dogs,animals,advice,Home and garden,Home and Family,Top Tips

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Written by Martin Davis using tags: advice, animals, Dogs, home and family, Home and Garden, Pets, Top Tips

Dogs are very different from cats. A dog will need a lot more of your attention, but when treated right they will love you as much as you love them.

Tip 1 " When you first get your dog, it is a good idea to attach an identification tag to their collar. Many owners do this so if the dog goes missing or runs away the dog can be easily returned.

Tip 2 " Different countries have different laws regarding registering your dog. You will be required to register your dog in most countries. The general practice is to insert a microchip into the shoulder blade of the dog. By doing this, the dog is then registered so if lost will be returned.

Tip 3 " When walking your dog it is always best to keep them on the lead until you get to the park or open space. Some dogs are also classed as dangerous and may need a muzzle.

Tip 4 " Leaving your dog outside for periods of time is generally fine, but make sure that there is plenty of shelter for the dog to hide away from the cold and rain. Make sure you still spend time with the dog outside as these animals are pack animals and like being around others.

Tip 5 - Going to the vet should be a regular thing, animals, like humans need checkups from time to time. It may not be cheap going to the vets, but it is cheaper to have regular checkups than finding out later on that your dog has a serious illness that could have been prevented.

Tip 6 " It is always a good idea to have your dog spayed or neutered. It is been proven that by doing this your dog will lead and longer and healthier life. If you do tend to use your dog a stud, then it is best not to!

Tip 7 - It is important that you provide your dog with a well balanced nutritional diet and make sure that they can easily get to fresh water when they need. This is especially important if you intend to feed your dog only dried food. When it comes to which food to give your dog as there are so many different kinds available it may be advisable to discuss the issue with your vet first. Certainly many owners today prefer to feed dried dog food simply because it is must easier and also contains the right balance of nutrients, minerals and vitamins that dogs need. The other choice you have and if you have the time is actually to prepare fresh meals for your dog which you can then freeze and give to them each day.

Tip 8 - If you have never owned a dog before then it is worth your while enrolling them in some obedience training classes. This way you can learn the most humane and safe ways to control your dog and provides you with a chance to bond much more closely with your animal. Your vet should be able to recommend a class for you, plus there are plenty who advertise in local newspapers and dog magazines. Before joining such classes go along and check them out first and speak with other dog owners who attend them.

Tip 9 " Dogs love to be out in the open, so taking your dog for walks once or twice a day is vital. A trip to park or around the local block is all it needs to keep your dog fit and healthy.

Tip 10 " It is important to look after your dogs appearance, make sure you regularly groom the dog so that their coat is clean and shinny. You can also buy dog teeth brushes to make sure your dog has nice clean teeth.

Above we have given you 10 top ways to keep your dog in shape. If you follow the guidelines you and your dog will soon be on your way to a great partnership.

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Written by Martin Davis using tags: advice, animals, Dogs, family, home and family, Home and Garden, Pets, puppies, puppy, Self Improvement, Top Tips