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The evolution of dogs

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Humans have participated in the evolutionary history of dogs since the origin of the relationship between the two. We have favored, through a process of domestication, the appearance of different breeds of dog. Today, most of our pets are purebred dogs. However, these dogs only represent 15% of all dogs that exist today, the remaining 85% are pooches or stray dogs.

In general, it is believed that pooches come from the cross between purebred dogs, but this is not the case. These dogs have arisen from the evolution by natural selection of the first candies that were associated with humans.

Natural selection has endowed the mutts with facilities to approach us, these privileges allow them to take advantage of resources that, directly or indirectly, we put at their disposal. That is, most dogs have followed their own evolutionary path and have adapted to live with us and obtain benefits.

” Illustrating science “ is one of the integrated projects within the Scientific Communication subject of the Postgraduate Course in Scientific Illustration at the University of the Basque Country. Taking a popular article as a reference, the illustrators made a new version with a central axis, the illustration.

The three statements in the first paragraph may well be true, but the scope of that “however” is unclear. All current dogs are the result of human domestication, including strays.

The two statements in the second paragraph are false. The pooches come from the uncontrolled reproduction of loose dogs and the crossing with purebred dogs. Most of the current breeds are very recent (barely two hundred years), but our species has been breeding and selecting breeds for different jobs since the Neolithic (shepherds, sight hounds and molossi). Feral working dogs have never stopped interbreeding with sleepy dogs.

What results “from the evolution by natural selection of the first candies that were associated with humans” is the dingo (which in recent decades is being domesticated again).

The genetic distance with the wolf makes the failure of the socialization between human beings of stray puppies very rare, although their ancestors have been for many generations.

The process of human domestication of loose dogs is not limited to indirect selection of traits by unintentional crossing with working dogs and pets. When aggressive behavior by dogs on the loose, alone or in packs, becomes problematic, we kill them. It is another process of indirect human selection of docility also among loose dogs.

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Dog Breeds

All About Dogs Breeds

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Small dog breeds
In the society we live inmore and more people decide to incorporate a pet into their lifeIf they are inclined towards a dogthe most common is that they choose a small breed of dog that meets their needs for affection and adapts to their lifestyle.
Medium dog breeds
Understood as the most popular and chosen dog breeds among all those who consider acquiring a petThe high versatility of mediumsized dog breedsin terms of adaptation to large and small spacesand the great ease of attending to their fundamental caremakes them the most successful option.
Large dog breeds
There are no statistics that indicate that smaller dogs are calmer and more docile than medium or large breed dogsIn factsome larger dogs are characterized by a more docile and calm behavior than other smaller onesmore nervous or exposed to environmental stimuli.
Calm or docile dogs
There are no statistics that indicate that smaller dogs are calmer and more docile than medium or large breed dogsIn factsome larger dogs are characterized by a more docile and calm behavior than other smaller onesmore nervous or exposed to environmental stimuli.
Dogs that do not shed or shed little hair
Almost all dog breeds tend to shed hairespecially in periods of change of seasonwhich causes permanent care and attention if you want your home to be always pristine.
Dogs for kids
It is well known that dogs can be the best playmates of childrenbecause in addition to sharing experiences with themthey offer them the opportunity to acquire very positive values during childhoodResponsibility and commitment are two of the fundamental aspects that a child can develop at an early age when growing up with a dog.

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7 FUN FACTS YOU DIDN’T KNOW ABOUT YOUR DOG

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Dogs are amazing animalsthey are full of vitality and their company makes our life more extraordinary,

not in vain they are attributed that they are the best friends of the human being;

in fact we are sure that if you have one dog or more than one you can confirm thisDogs have great abilities that we already know,

such as their excellent sense of smell that is approximately 100,000 times sharper than humanshearing and their intelligence that does not stop surprising usdogs have more abilities and their organisms are full of curiosities

that you can find out below.
1Your body language is key to understanding them.
Dogs use their body language more frequently to communicateunlike us humans who have a system of written and sound codes that we call languageThat is why it is important that you discover what are the main signals that you

friend uses with his body to express himselfthese are some.
To avoid confrontations
These signs indicate that your dog does not want to conflictheadquarters and seeks to pleaseis condescending:
• Licking the muzzle or ears of another dog
• Curving the body
• Constantly blink
• Show teeth in the form of a smile
• Bow head and ears
• Reverence

Stress
Generallyyour dog does them when he does not feel comfortablesafe or does not have the environmentalhealthy or nutritional conditions corresponding to his needs:

• Yawn
• Scratch
• Sneeze
• Lick your nose
• Grinding teeth
• Shake to release tension

Of tranquility
These are the signs that your dog uses to indicate that he is happy and comfortable with his surroundings.

• Turn around
• Take several constant jumps
• Sniff the ground
• Following orders like giving the paw
• Play

2Dogs don’t sweat like humans.
That’s
 righthumans sweat and expel heat through our cutaneous system made up of the skin by expelling sweat,

however dogs expel sweat only through the pads of their paws and their tongue,

that’s why when you carry your Walking dog does not feel its coat wet,

but if you can perceive that it is panting constantlythis is the mechanism to regulate its body temperature and

perspire.

3Dogs have sharp eyesight but see differently.
During history this has been a constant research topicpreviously it was said that dogs only saw in monochrome,

that isin black and whitebut more recent studies have discovered that although dogs see colortheir ocular system perceives the light by ranges and with less sharpness.

4Dogs have a footprint but it is not digital.
Each dog has a unique mark that differentiates them from the otherstheir nose has the same identification purpose as our fingerprint.

5Dogs as a species not only colonized our hearts but also the earth.
It is very curious but truedogs are one of the species that have the most presence on all continents and are the only one with the most diversity of breeds in the whole worldthere are as many breeds of dogs as there are flavors and

colorseach breed including those that They are not standardizedthey have very particular physical and

behavioral characteristics but they do all have something in commonbeing the best friends that can exist.

6Dogs are also lefthanded or righthanded.
It is very easy to identify if your dog is lefthanded or righthandedYou just have to sharpen your attention and play with your friend.

Throw a toy at him and see which leg he uses first to catch the toyYou must repeat the activity several timesThe leg that you use the most will tell you if it is lefthanded or righthandedit is also believed that this is associated with the character of each specimen.

7Dogs have a good memory.
The intelligence and memory of dogs is associated with that of a 2yearold childResearch has found that dogs can recognize and remember around 250 wordssurely among those they identify friendship.

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Discover 7 Amazing Facts About Canine Smell What amazing dogs are, no one doubts!

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 There is no lack of reasons to consider dogs our best friends. But, there are many facts about them that are still true mysteries. The canine sense of smell , for example, is one of the issues that still intrigues scientists! With adapted noses and a capacity far superior to ours to smell odors, your four-legged son is almost a superhero! If you are interested in the world of pets, read on to learn 7 facts and all about canine smell !
1. A dog’s snout is a perfect organ
Our four-legged friends’ noses may look very cute, but this important organ is actually a wonder of nature. The dog’s muzzle was perfectly designed to be a sniffing machine. Starting with the format. The design of the dogs’ nose allows them to breathe in through one channel and out through the other. This way, the pet with a good scent can “smell” many times the same air sample, capturing more elements with each sniff! Besides, dogs’ noses are not iced for pure charm. Moisture in the muzzle allows particles present in the air to become more active and more easily stick to sensitive organs.
2. Canine Smell: They can smell “in stereo”
Yes, it may sound strange, but this is a dogs ability! Dogs’ noses have olfactory cells with impressive characteristics: the ability to sniff with their nostrils independently. Thus, dogs can more clearly perceive where the smells are coming from: whether on the left or the right. It works, more or less, like our ears. We can sense when a sound comes from the right or the left, right? The same goes for the canine sense of smell! 3. Dogs have a channel just for smell While we humans breathe and smell in the same way, dogs have a channel just for the refined sense of smell . When a dog inhales, some of the air follows its route to the lungs. However, part of the air follows a different path, dedicated exclusively to smells. There, he can decipher the codes present in the air, much more efficiently than ours.
4. Canine smell with many more olfactory cell
In the exclusive compartment for sniffer dogs there are many olfactory cells. These special organs are designed to understand smell. A dog, on average, has 300 million of these cells, against only 5 million present in humans. This guarantees our furry friends an infinitely superior sniffer ability than ours. In fact, studies show that dogs can sense samples 100 million times smaller than a human needs. A practical example: you are on the top floor of a building 100 meters high and prepare a recipe. A dog can smell the same as you, even outside the building.
5. Dogs are not prejudiced When compared to dogs ,
our way of perceiving smells is rather primitive. We can, for example, smell good pasta, or notice that something in the fridge is spoiled because it smells bad. For dogs, everything is different! He will be able to tell that the ingredients used were onion, garlic, tomato, pepper, flour and oil. More than that, he can tell even if you’ve overdone the salt, all this just with your sense of smell. The same happens with bad smells and, for dogs, it doesn’t make much difference. They don’t distinguish between “good” and “bad” smells. For them, everything is information and, as they are by nature curious, they can perfectly smell a pile of rubbish, without bothering.
6. With their sense of smell,
they can sense our emotions Many people believe that dogs can feel emotions from a distance. Well, studies show that there is a scientific reason for this! Dogs have a specific organ for smell, called the Jacobson organ or vomeronasal. Located between the mouth and the muzzle, this special organ knows how to identify hormones based on their smells. That way, dogs can sense when someone is angry, stressed, and even sick!
7. The canine sense of smell is a time machine!
Perhaps the most interesting fact about canine smell is that it acts like a real time machine. Because their ability is so potent, dogs can, for example, perceive things from the past. When entering a room, they can tell who was there, what that person ate, when he left, and which way he went. On the other hand, they can also sense things in the air at a distance. Thus, they notice if someone approaches from afar, if the person is coming on foot, by car or bicycle, and even if it will rain soon!

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