noise Archives - Fear Free

Color Me Fear Free

Heather E. LewisThe way people interpret color is tied strongly to human culture and language. For example, feeling blue means feeling sad, and seeing red means feeling angry, at least in Western, English-speaking cultures. But how do animals see and respond to color? The answers are few, as there is little research in this field of study. We can say that dogs and cats see a narrower range of colors than we do. This is because they have traded color vision, biologically speaking, for superior vision at night. Indeed, dogs and cats see much better at night than people do.

Cats have trichromatic vision, just like humans, but they do not see the red end of the human visible spectrum. Dogs have dichromatic vision, which means they do not see anything in the orange and red range in the human visible spectrum. Both species see slightly into the ultraviolet range. This is fascinating as it means that any material that has phosphorous in it, or a whitening or brightening agent derived from phosphorous, will fluoresce slightly under their vision. For example, a piece of paper is a glowing white object to a cat.

Fear Free color palettes have three objectives relating to the little we do know about animal preferences for color and stress reduction for people and animals alike.

To avoid anything bright white that may fluoresce. This is the reason behind abandoning a white doctor coat. People often react with stress to laboratory coats, and this is called “white coat syndrome.” If we are trying to create a low-stress medical experience for animals, it is likely best to dress veterinary doctors in colors that do not stand out. Thus, Fear Free practitioners prefer softer colors for coats and scrubs. Architects should also check the building materials we are using in hospital spaces and avoid materials that fluoresce. You can test for this by using a Woods Lamp (a black light used in the veterinary and human healthcare industries for detecting ringworm), in a space with the lights turned off. The lamp will identify materials that fluoresce.
To use colors that animals can see well, particularly in low-light conditions. If you were to paint a dog or cat medical ward dark red, and have dim lighting in that space, the space would appear dark grey and shadowy to the animals. A lighter space, painted in hues and tones that are brighter and more toward the blue end of the spectrum, will be more visually understandable to the animals. There is very little research on this idea, but one example is a study in mice, who see similarly to dogs and cats. The study indicated that mice “showed clear and consistent individual preferences for cages when offered a choice between white, black, green and red cages. Overall, most mice preferred white cages, then black or green, and red was the least preferred.”[i]
To use colors that are relaxing to people. Think of a spa, and the colors that are used in a spa, which are often toward the bluer end of the spectrum, or they are nature based. Spa color palettes tend to be relaxing to people and remind them to slow down and move carefully and gently. The research of color on human behavior is well understood; fast food restaurants use reds and oranges because they are NOT relaxing, and they motivate you to move along and finish your food quickly, so the booth may be occupied by the next customer. We want to encourage the opposite behavior.

Do not worry about hard and fast rules about color, as they don’t exist. Quite simply, use color as a reminder to yourself to be more considerate of how our animal friends see, and to support a gentler way of being around dogs and cats, and all the animals you care for.

This article was reviewed/edited by board-certified veterinary behaviorist Dr. Kenneth Martin and/or veterinary technician specialist in behavior Debbie Martin, LVT.

Heather E. Lewis, AIA, NCARB, is a principal of Animal Arts, an architectural firm that has exclusively designed animal care facilities, including veterinary hospitals and animal shelters, for more than three decades. She has worked on dozens of projects across the country, both large and small in her 19 years with the firm. Heather is a member of the Fear Free℠ Advisory Board and assisted in creating the Fear Free facility standards for veterinary hospitals. Heather is a regular contributor to various veterinary industry magazines. She has spoken on the design of facilities for the care of animals at dozens of national and regional conferences including Fetch Hospital Design Conferences, the UC Davis Low Stress Animal Handling Conference, and the Humane Society of the United States Animal Care Expo.

Fear Free Shelters: Noise Control Basics

Heather E. LewisNoise is a notorious problem in shelters. When we reduce noise in shelters, we also moderate factors that cause fear, anxiety, and stress. Controlling noise is both an art and a science. Here are some helpful tips:

Create a calm environment and reduce mental stress. Because dogs cause the noise, it is important to ease dogs’ mental stress, so they feel less prone to barking. Regular exercise, outside time, supervised play groups, and walks help them to use their energy in positive ways. Creating feeding, cleaning, and bedtime routines in the shelter whenever possible so dogs know what to expect can also reduce their stress. Limit unpleasant stimulation as much as you can given your means. For example, for some dogs with barrier anxiety, it can be helpful to place a partial barrier on the fronts of their runs, so they have a choice of retreating from visual stimulation. And although it is sound, specially composed calming music may help to relax dogs and promote less barking. When played at low volume, it is meant to create calm rather than to mask noise.
Reduce the reverberation. Once you have done everything you can to lower stress through behavioral means, this is when building materials become more effective. Your best place for noise reduction is the ceiling! Choose a ceiling material with a high Noise Reduction Coefficient (NRC). The material should also be cleanable and antimicrobial. This is not impossible, as ceiling materials have improved. We like the Rockfon Medical Plus ceiling panel. This product achieves an NRC of .9, which means that 90 percent of reverberant noise within a tested frequency range is absorbed by the material.
Absorb the sound. In addition to the ceiling, you can place sound-absorbing panels high on the wall to reduce noise in the space. Please note that these sound panels are not enough on their own; they must be paired with the ceiling. Choose a panel with a high NRC and choose the thickest product offered as this one will absorb noise in a broader frequency range. Sound-absorbing panels do not need to be ugly! We use products that can be printed with a photo or image for a custom look.
Contain the noise. Beyond absorbing noise, it is also important to prevent it from affecting other shelter occupants, especially cats. We do this by ensuring that rooms containing dogs also contain the noise. The best way to do this is to build a wall with heavy mass (concrete block, etc.) around the dog housing. You can achieve the same result by layering materials. For example, a stud wall with sound insulation and two layers of drywall on each side will be much better than a stud wall without those materials. Keep in mind that a sound wall is only as good as its weakest point. To design an effective sound wall, do the following:
- Build the wall up to the structure, so no sound “flanks” over the top of the wall.
- Seal penetrations through the wall, such as duct and conduit penetrations.
- Install gasketing around doors into the room, and a sweep on the bottom of the door.
- If there are windows into the room, provide double glazing in the windows.
Separate dogs from other spaces. Despite doing the above, dogs are still loud. We recommend having more than one wall between dogs and cat spaces, or dogs and other quiet spaces such as offices. If the cats are right next to the dogs in your shelter, consider moving them to another room in the building, if possible.
Mask the noise. As a last resort, you can use masking noise to make your shelter feel more pleasant. An example of masking noise is soft white noise. While these sounds can be effective, we put this at the bottom of the list to encourage you to truly solve your noise problems first.

Your shelter does not have to be noisy! With a multifaceted and rigorous approach that begins with reduction of mental stress for dogs, you can create a much more peaceful, Fear Free place for animals and people.

This article was reviewed/edited by board-certified veterinary behaviorist Dr. Kenneth Martin and/or veterinary technician specialist in behavior Debbie Martin, LVT.

Heather E. Lewis, AIA, NCARB, is a principal of Animal Arts, an architectural firm that has exclusively designed animal care facilities, including veterinary hospitals and animal shelters, for more than three decades. She has worked on dozens of projects across the country, both large and small in her 19 years with the firm. Heather is a member of the Fear Free℠ Advisory Board and assisted in creating the Fear Free facility standards for veterinary hospitals. Heather is a regular contributor to various veterinary industry magazines. She has spoken on the design of facilities for the care of animals at dozens of national and regional conferences including Fetch Hospital Design Conferences, the UC Davis Low Stress Animal Handling Conference, and the Humane Society of the United States Animal Care Expo.

Even Mild Fear of Noise in Dogs Has Broad Effects

Linda Lombardi
Mild cases of noise reactivity in dogs are often not considered problematic enough to treat. However, in a recently published study, even mild noise sensitivity was associated with lower performance on a puzzle test. This suggests that these dogs have impaired functioning even when noise is not present and that more screening and treatment is called for.

Researchers analyzed three types of data collected as part of a larger study of pet dogs. Dogs were evaluated for noise sensitivity via a questionnaire and a score was calculated based on the number of categories of noise that caused a reaction, the behaviors indicative of fear and anxiety that were exhibited, and the intensity of the reaction. Dogs were also tested for noise sensitivity using a custom noise recording that was played starting at a low volume and gradually turned up.

Learning Affected

Dogs were then evaluated for their performance on a puzzle-box test. The clear plastic puzzle box had nine holes on top and one at the end. A tennis ball was rolled into the box and dogs were given five minutes to try to get it out. If they succeeded in under two minutes, they repeated the test, up to three times in total. While attempting the puzzle, the dogs were wearing a device that recorded their movements.

Comparing data from 17 noise-reactive dogs and 11 non-noise-reactive dogs, those who were sensitive to noise performed worse on the puzzle box. Movement recordings also showed a difference, says lead author Karen Overall. “The ones who did the best moved very efficiently and very quickly. Their movements counted. The dogs who reacted to noise and who did more poorly, or could not solve the test, had very jagged and inconsistent movements.”

These dogs did not seem to be able to move in a deliberate, coordinated manner in response to how the ball acted when they tried to manipulate it. “They have to correct their behavior according to the movement of the object that they see,” she says. “These dogs couldn’t do that.”

Some of the noise-reactive dogs did not perform well enough to repeat the test, but when they did, they also differed. “Unlike the dogs who didn’t react to noise, the dogs who did react to noise couldn’t learn from their previous tests and didn’t improve their scores,” she says.

Sound Effects

While it’s understood that being in a state of anxiety interferes with functioning, the results show that being noise-sensitive has more wide-reaching effects. Even in a relatively low-stress situation where noise was not an issue, these dogs showed impaired performance: “The room is quiet, they’re getting food treats, their people are there, but they still can’t learn.”

Overall says it’s important to understand that this was not a clinical population of noise-fearful dogs. “Largely they were fairly mild, and yet they still couldn’t do this,” she says.

They also were not generally fearful, which was screened for. “The dog who was the worst in the test, the only dog for whom we had to turn off the recording, she was the meet-and-greet queen of the universe,” she says. “She was charming and social and lovely until you played noise, and then she was broken.”

“Moderate to severe noise sensitivity in dogs is a well-known behavior problem. A connection between separation anxiety and noise sensitivity has also been recognized before. What has not been appreciated until Dr. Overall and her colleagues published this research is the impact that noise sensitivity has on the general anxiety levels and learning ability of affected dogs,” says Bonnie Beaver, DVM, DACVB, of Texas A&M University. “These changes exist even in mildly affected dogs, impacting their daily lives with ever-present stress.”

Screening and Treatment

Overall concludes that even mild fear of noises needs to be aggressively screened for and treated.

“I think we don’t realize how much these dogs are suffering,” she says. “This shows that you’ve got dogs who are afraid of noises and it’s impairing other parts of their life that people haven’t looked at. It’s impairing their ability to get information from the environment and their ability to problem solve.” This has a broad impact on their social functioning and their fundamental ability to enjoy life.

Overall now believes dogs should be screened for noise reactivity on every vet visit and that it’s particularly critical to screen young dogs. “I want vets to see dogs three or four times a year in the first two years of life, when their brains are developing, and subject them to standard screening tests,” she says.

This is important because early diagnosis and treatment can make a huge difference. “The rodent literature has shown that if you’re anxious and fearful and from a genetically fearful line, and they treat you as a baby, your brain develops normally,” she says. “And what wouldn’t we give for that? There’s too much suffering; I want these dogs to have joy.”

This article was reviewed/edited by board-certified veterinary behaviorist Dr. Kenneth Martin and/or veterinary technician specialist in behavior Debbie Martin, LVT.

Linda Lombardi writes about the animals that share our planet and our homes for magazines including The Bark, websites including National Geographic and Mongabay.com, and for the Associated Press. Her most recent book, co-authored with Deirdre Franklin, is The Pit Bull Life: A Dog Lover’s Companion.