Not really. Dogs could possibly cause some minor damage to hardwood floors, and in some cases, it will be more obvious than in others. For example, some people like the look of black hardwood floors, but they show scratches from dog nails more clearly than lighter floors.
While Hardick maintains that dogs over 100 pounds and hardwood floors should never mix, owners of little dogs like Chihuahuas and pugs have several good options. 
"While a big dog will scratch and gouge more than a little guy, trimming nails is a good idea for dogs of all sizes," says Hardick.
The acid in animal urine or vomit can damage the finish and the wood floor boards. Large, active dogs with long, sharp nails digging into hardwood can cause scratches and dents. Spilled food or water, when left for extended periods of time, can seep into hardwood plank seams and lead to unsightly water damage.
Don't use straight ammonia, alkaline products or abrasive cleaners. They'll dull or scratch the finish. Don't rely on lemon juice or a vinegar-and-water solution to clean hardwood floors. "I don't recommend using vinegar or lemon juice, at least not in large quantities, as these can damage the floor's seal," said Wise.
Rugs protect your floors.
Daily life, along with heavy furniture, can cause permanent damage to your hardwood floors if you're not careful. So keep your floors in good shape by adding a rug! Rugs (plus a rug pad) will eliminate any potential damage a heavy piece of furniture can do.
Oil and wax-based matte finishes are best for households with dogs not only because they conceal dust, dirt and small scratches, but also because oil penetrates into the wood without forming a thick surface film.
A dog's paws are made for gripping natural terrain. Hardwood floors and smooth surfaces such as tile don't play to your dog's natural gripping abilities. Your dog's paws were made for gripping the earth. The nails “dig” into the ground for traction like soccer cleats.
Over just a few months, your wood floor will begin to look dull and worn just because of all the scratches on the finish from dog nails. Unlike cats, dogs do not fully retract their nails, so they are always clicking on the floor when they walk. You can reduce the damage by keeping your dog's nails nicely trimmed.
If you own a dog, at some point you will have to clean up accidents off the floor. Urine needs to be removed from Hardwood floors immediately because the standing liquid can warp the wood, soak deep down into the crevices and leave behind odors.
Wood Flooring will scratch. Being a natural product there is truly no way of getting away from this fact. Scratches however need not necessarily be looked at as a bad thing with wooden flooring. Many believe that these markings very much add to the character of the flooring - taking away from the pristine nature.
Use fine-grit sandpaper to buff out minor damages. You can rub a raw walnut over a scratch, or you can apply a thin layer of coconut oil to blemishes and then buff in the oil. Use a blending pencil to fill in and color small scratches but be sure to pick the right color.
The best flooring option for a home with dogs is not wood at all. Take your pick of any alternative: vinyl, laminate, tile, or stone. All might be better than wood in a house with a dog.
Use a non-slip surface to introduce your dog to a slippery tile or wood floor. You can place small mats that will not slip and slide under your dog's paws on the floor in various places so your dog can use them as stepping stones to walk across the floor.
Absolutely. Dogs are actually very comfortable with sleeping on hard flooring. Their main motive in life is to feel safe, protected and often prefer the coolest spot they can find during resting periods.
While engineered wood is the clear choice for pet friendly floors, we do have a few helpful tips to keep your floors looking their best: Keep pet nails trimmed. Put a placemat or some other protection under water and food bowls, and the litter box.
Waterproof rug pads are your best line of defense against pet urine on area rugs. They provide a strong barrier that will prevent your dog's accident from seeping into your hardwood floors. This prevents the need for time-consuming refinishing required to remove pet stains from wooden flooring.
Natural rubber is safe to use on hardwood floors. A rug with plastic or artificial rubber backing contains glue or adhesives, and unfortunately these are harsh on hardwood floors. They can scratch and ruin the wood, incurring damage costs.
At the end of the day, the decision between carpet or hardwood floors is primarily based on preference. Many people prefer carpet in bedrooms because they enjoy a softer surface. And in the case of two or three-story homes, carpet can also help reduce noise.
The Not-So-Good:
Bathroom– Water is hardwood flooring's arch nemesis. In the bathroom, there is almost always water coming from somewhere. Even if it's just by accident, water can easily get on the bathroom floor. If that floor happens to be hardwood, it can quickly be ruined.