It depends on what your definition of "useful" is. If you want something that catches mice and will sit in your lap, a cat may be more "useful". On the other hand, a Yorkie will also go after mice and sit in your lap. Cats do not need walks. It all depends on what you need. There is a breed of dog for almost anything you would like to do or any quality you like in companion. Sled dogs, running dogs, vermin dogs(terriers), lap dogs, sport dogs, etc.
A ferret they have the quilty of a dog and cat + more of there own.
both.
Mosaic, the same as a cat hair. Cat and dog hairs are difficult to distinguish between.
Yes, there's a difference between cat years and dog years. What we call "dog years"(to calculate a dog's "human" age), is simple. For every human year a dog has lived, that's 7 "dog years". So a 2 year old dog is 14 dog years, while a 5 year old dog is 35 dog years. A cat's age is a little more tricky. Different sources vary slightly, but this is the most common way. The first year of a cat's life is 15 "cat years". Then you add 9 "cat years" for the second year, so a 2 "human year" old cat is 24 "cat years". For every "human year" after that, you add 4 "cat years". An 8 "human year" old cat would be 48 "cat years". "human year" = 365 days, one revolution around the Sun "cat year" = the comparative "year" for a cat based on milestones, such as walking, sexual maturity
cat then dog
My personal thought is a dog. But it's right up there with cats, too. Most places have debates between dog and cat. But dogs are more useful, energetic, and playful. Cat's are snuggly, small, and most of the time are more attached to you. That is, if you don't have one with rabies. :P
Humans have fingers and thumbs, useful for picking things up, where as cats and dogs only have pads.
A dog has more teeth than a cat.
A cat and a dog.
Probably the main reason is that we have longer fingers and opposable thumbs, so we can do more complicated things.
a dog
no. the only main difference between cat and dog food is that a dog food can contains preferably more meat than a cat food can. basically, if a dog eats cat food, there should be absoloutely no problem.
depends on the type of dog or cat dog are more playful then cat
Neither, but more closely related to a cat than a dog
It depends on if you're the cat or the dog
DOG
dog...i think