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Questions tagged [dogs]

The common name for Canis lupus familiaris, which are domesticated canines.

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Could we breed a dog to the size of a thumb?

We've gotten from a wolf to a small breed such as a chihuahua. So the question is: can we go even further and have a dog as small as a thumb (adult dog)? If not, what are the factors that limit the ...
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1answer
40 views

How many teeth can “African wild dogs” have?

The New York Times article In Mozambique, a Living Laboratory for Nature’s Renewal discusses reintroduction of what the article calls only "African wild dogs" into Gorongosa National Park in ...
7
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1answer
82 views

Best colour for a dog to track an object against green background

As dogs have limited colour perception, what colour would appear with most contrast against a green background for a dog? I understand that red and green are very close in a dog's colour perception, ...
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2answers
173 views

Did Darwin explain why he believed that domestic dogs descend from several distinct species of ancestor?

Charles Darwin begins his book Origin of the Species (1859), in which he argues that species evolve as a result of variations caused by natural selection, with a chapter about variations that have ...
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1answer
47 views

What advantage do dogs have in clearly disclosing whether they are afraid or unafraid in a conflict?

Dogs are known to clearly show whether they are afraid or unafraid with the posture of their tails during a conflict. How and why is this beneficial? My limited understanding makes me feel that, in ...
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1answer
113 views

Why are dogs so selective about choosing a spot to defecate?

Anybody who walks a dog knows that dogs are normally selective about choosing a spot to defecate. They sniff around for a long time, while I just want to be on my way. I understand about marking ...
70
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3answers
14k views

Why shouldn't dogs eat chocolate?

I was wondering why dogs shouldn't eat chocolate. Can't dogs just excrete the indigestible component in their droppings? It's common knowledge that dogs shouldn't eat chocolate. What I don't know is ...
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5answers
12k views

Why these 2 dots frequently occur in dog's eyebrows? Do it serve/served any advantage?

It has been wonder me, in spite of so-many variations in color-patterns in dogs; these 2 dots (1 on each eyebrow) remains frequently occurring. Dog-1 Dog-1 close up. this one has a white dot. ...
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1answer
941 views

Do pet animals and humans perceive good and bad smells differently

As the title says, just wondering if there is a difference in what animals like dogs and cats perceive as good smell vis a vis humans. Example : Smell of some flowers - great . Fart smells - bad.
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3answers
540 views

Do animals' facial expressions have similar meanings to humans'?

In the following pictures, the dog seems to be smiling to the camera. People staring at these picture also tend to feel comfortable and relaxed, presumably because they think it's very happy playing ...
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1answer
545 views

Do any dogs have blue iris - not just sclera? [closed]

I was looking in to the question of whether any dogs in fact have "blue eyes"... A quick search gives plenty of information on and images of dogs with blue sclera and black iris. Every "blue-eyed" ...
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2answers
267 views

When did the most recent common ancestor of all living domestic dogs live?

Wikipedia provides a very detailed page on the origins of the domestic dog, but this fact does not seem to be present there. Google searches for terms such as "most recent common ancestor (MRCA) of ...
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430 views

How long a dog can remember its owner's smell?

Can dog remember multiple smells? and how long it can remember a smell?
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1answer
556 views

Evolutionary advantages of wet nose of cats and dogs?

Everyone knows that some animals, at least cats and dogs, keep their noses wet and cool. But why did they evolve it? What evolutionary advantages does it provide? Smell-sensing cells need cooling for ...
12
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1answer
9k views

Why do human eyes glow red on a photo and dog's eyes green?

Previous Research I know that cameras sometimes come with an anti "red eye" functionality that involves two flashes, presumably the second flash coincides with the shutter opening. Question Why do ...
11
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2answers
607 views

Can canines communicate with each other using gaze direction?

After researching why humans have white scleras when most primates have dark scleras, I stumbled upon the cooperative eye hypothesis. It proposed that white scleras may have evolved on behalf that it ...
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1answer
1k views

Do wolves bury food like dogs?

Many breeds of domestic dogs seem to like burying food, presumably in preparation for leaner times. Assuming that dogs evolved from animals similar to the modern wolves through a mix of natural and ...
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1answer
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What studies are there showing the effectiveness of any substance on canine hypertension?

Searching on http://www.ncbi.nlm.nih.gov I could only find the article titled as "Telmisartan Treatment of Refractory Proteinuria in a Dog".
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How did the roar evolve from snort?

When Lions roar, or Dogs show aggression, they do that snort-roar thing. They're producing sound while inhaling. How did that come to be when all (?) other forms of sound involve exhaling? Humans do ...
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1answer
467 views

Dogs bark at familiar person in Santa costume. Why? Don't dogs trust smell over vision?

Last night 10 humans and 2 dogs spent Christmas together. At some point, one human dissappears for a few minutes and comes back wearing a full Santa outfit. Upon respawning, the dogs start barking ...
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1answer
134 views

How diverse are dogs in their traits other than appearance?

I've asked this question about dogs not so long ago, and the short answer was - dogs are the most diverse looking species of mammals because they got a small number of genes that have a big impact on ...
5
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1answer
384 views

Is there a DNA test to identify dog mixes?

We adopted a dog at the age of two. Our vet said it was a mix of an Australian Shepherd and Border Collie, which we've told everyone. Based on markings, I think it's likely. I am wondering, however, ...
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3answers
458 views

Can any species be bred selectively/engineered to become as diverse looking as dogs?

I've done some research and it appears that dogs are the most diverse looking single species of mammals. The questions that interest me is - are dogs special in respect to genes/gene activation ...
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1answer
26k views

Why do dogs try to cover their poop?

It may seem obvious to us humans to hide our excreta, but this is not quite normal behavior for animals. Interestingly, dogs have the habit to pee all over the place. It's know that they do so to ...