Because, small dogs are better for apartment living.

DIY Porch Potty for dogs. This will come in handy when I move to an apartment for college!
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You can also consider using sun-blocking curtains. They prevent the sun’s rays from over-heating your apartment, keeping the space cool and comfortable. Put your dog’s or cat’s favorite toys in this designated “cool room” to help them feel .
Since small dogs take up less space, many apartment dwellers prefer the smaller dog breeds.
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Contrary to popular belief, small size doesn't necessarily an apartment dog make — plenty of small dogs are too high-energy and yappy for life in a high-rise. Being quiet, low energy, fairly calm indoors, and polite with the other residents, are all good qualities in an apartment dog. UTICA, N.Y. (AP) — Officials in upstate New York have rescued 44 dogs from a woman’s apartment.
Photo provided by Flickr, N.Y. (AP) -- Officials in upstate New York have rescued 44 dogs from a woman's apartment.
Photo provided by FlickrHere are the top 10 breeds of dogs which have been found to do well in apartment living—
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Pet owners often worry whether they can adopt a dog when living in an apartment. Fortunately, that’s totally fine. There are even the best apartment dogs to fit that lifestyle better.Likewise, large dog breeds do not need a big house to feel comfortable. Certain giant breed dogs are known to be great apartment dogs, as you’ll see in the list below.Below we will a total of 21 best apartment dogs that you can look into adopting. But before that, there’s something you need to know about apartment dogs.Even though it so happened that most best apartment dogs on the list below are small breeds, the fact of whether the breed (or a mix of them) is suitable for an apartment depends on several factors other than the size of the animal.Now, when you read our list, you may think we may have made some mistakes! You are going to notice some *very* large dogs listed as suitable choices for apartment life. Don’t let the size of the package fool you! Large dogs do not necessarily need large amounts of exercise and often they are quite placid inside the house. If you’re like me, you have dog fever 24/7, but also live in a small apartment space and are aware that your dream of being a dog mom to no fewer than two St. Bernards and three Great Pyrenees is probably never going to come true. Apartment life is tough on certain , who need space to run and stay active. They need yards, and let’s be real, you don’t even have a functioning fire escape. But your dog dreams don’t have to die if you are willing to seek out a breed of dog that can more easily adjust to your living space. Let’s take a look at the best apartment dogs for you city dwellers.Most of the dogs on this list of the best apartment dogs were chosen for their ability to fall into the categories of: Easily groomed, quiet and low activity. However there are exceptions on this list, and we will point these out where they are needed. So you’ve found an apartment that allows dogs, you’ve put down your pet deposit or pet fee, and maybe you will even have to pay monthly pet rent.