You can go along way asking questions that others don't ask. That's what we did and here is what we found out.
Polyurethane Foam
This is what is in most of the cheaper and some of the expensive beds in either a solid or chipped form. It is basically petroleum with added chemicals. It's made from a non renewable resource (oil) and whilst claims as to its recyclability have been made, it has proved to be difficult and has a very limited application and so most of it still ends up in landfill.
Even the best of these foams break down losing up to half of their weight over a ten year period of use. Polyurethane oxidises and creates a dust that settles around the home and it also off gases a neurotoxin called Toluene [i] which is then breathed in by its inhabitants.
Depressingly, it's worse for animals as they will lick their paws and coat thereby ingesting it. A chemical cocktail that just isn't possible to drink responsibly.
This is all bad enough however if you enclose all of this into a covered bed you effectively create a gas chamber.
Memory Foam
Memory foam is essentially a polyurethane with more chemicals added to it to give it its viscosity and elasticity properties which allow it to regain its shape.
Often purchased for elderly dogs to ensure maximum orthopaedic support, memory foam beds are easily one of the most toxic beds available. The problem isn't just what's in them but also how it reacts with the body.
It is designed to mould to the body but because of this it can cause difficulty when your dog wants to turn over especially for one that has poor mobility. Also, low quality memory foam mattresses tend to flatten and as a result position you animal unnaturally. This leads to poor blood circulation, increased stress on pressure points and uncomfortable joints. In other words it is doing the exact opposite to what it's intended to do.
Additional to that, it holds in the heat and moisture which makes for a hot and uncomfortable experience for your animal. A 2002 study published in the European Journal of Allergy and Clinical Immunology reported the presence of dust mites in polyurethane foam mattresses at four times more than in spring mattresses. It can also be next to impossible to remove mites, bacteria and allergens from these mattresses.
Fire Retardants
Because foams are extremely flammable they are sprayed with fire retardant chemicals. Many of these potent chemicals have been linked to a broad range of serious health risks, including infertility, birth defects, neurodevelopmental delays [xii],reduced IQ and behavioral problems in children [xiii], hormone disruptions [xiv] and cancer. They are also known endocrine disruptors and neurotoxicants in animals [xv] [xvi].
In fact, flame retardant chemicals have been identified as one of 17 "high priority" chemical groups that should be avoided to reduce breast cancer [xvii] [xviii] [xix]. However, the effectiveness of these chemicals is hotly disputed and there is virtually no evidence to support their use. Infact they only serve to make the air more toxic and you are more likely to die of toxic gas inhalation in a fire than from the fire itself.
But you don't need a fire to stir up this chemical brew. Because some of these chemicals aren't chemically bonded they don't stay in the foam but instead join the toxic migration into the house dust which is then breathed in by all its occupants [xx]. So alarming are the effects on people, animals and the environment that nearly 150 scientists from 22 countries have signed a open letter raising their concerns [xxi].
Stain resistant finishes
These really are the icing on the cake. They fit within the family of PFC ( Perfluorocarbon) chemicals and are commonly known as Scotchguard, Teflon, Nanotex, Greenshield Zepel and Crypton Green.
Unnaturally persistent, they break down in the body and in the environment to form PFOA, PFOS and other chemicals that take decades to dissipate ( as long as you don't take on board anymore).
Whilst the long term health effects are little known [xxii]we do know that the are responsible for reduced fertility [xxiii] [xxiv] and have been classified as a likely human carcinogen [xxv] [xxvi].
In animals, exposure to PFCs have been linked to liver toxicity [xxvii], liver cancer [xxviii] and various hormonal [xxix], developmental and immune system abnormalities [xxx]. Also, increased neonatal and adult mortality [xxxi] [xxxii].
Components Researched
Additional Related Chemicals
Toluene [i]
Emits toxic fumes of cyanide, hydrogen chloride, sulphur oxides and oxides of nitrogen
when heated.
Inhalation causes irritation and sensitisation,dry throat, chest tightness, shortness of breath, anxiety, paraesthesia and ataxia.
Ingestion causes gastrointestinal irritation with nausea, vomiting and abdominal pain.
Dermal exposure causes inflammation, blisters, erythema and itching; sensitisation and
allergic contact dermatitis.
Ocular exposure to the vapour may cause pain, burning, lacrimation, superficial lesions
and conjunctivitis.
Formaldehyde [ii]
Skin irritation (dermatitis).
Irritation to the mucous membranes, eyes, nose and throat.
Gastrointestinal irritation.
Ocular exposure to formaldehyde may result in permanent alterations to vision or blindness.
Carcinogenic.
Isocyanates [iii]
Asthma.
Skin irritation (dermatitis).
Irritation to the mucous membranes, eyes, nose and throat.
Gastrointestinal irritation.
Chemical bronchitis.
Pneumonitis.
Hives.
Even if this is removed symptons may improve but acute asthma attacks may still occur after renewed exposure even if the exposure is very small or very brief. Isocyanates are insoluble in water, and are not easily washed off.
Methylene Chloride or Dichloromethane [iv]
Carcinogenic.
Prolonged and excessive inhilation can cause death.
Mucous membrane irritant.
Can harm the nervous system producing nausea and confusion.
Can form carbon monoxide in the body which decreases the ability to carry oxygen.
May aggravate existing heart conditions.
Trichloroethane [v]
Highly toxic by inhalation, ingestion and skin contact.
Can cause central nervous system depression which can lead to loss of consciousness.
Skin irritation (dermatitis).
Eye irritation.
Benzene [vi]
Toxic by inhalation and ingestion.
Harmful and irritant.
Carcinogen and possible mutagen.
Acute exposure to low levels can be irritating to eyes and can result in drowsiness, tachycardia, headaches, tremors, confusion and unconsciousness.
Mucous membrane irritant.
Can cause leukaemia.
Methyl Benzene [vii]
May affect the nervous system if inhaled.
Methylene dianiline / MDA [viii] [ix]
Suspected carcinogen.
Can cause liver and thyroid damage if ingested.
Eye irritant.
Skin irritant.
Vinylidene chloride [x]
Possible carcinogen.
Linked with respiratory problems and central nervous system side effects.
Dimethylformamide [xi]
Can cause liver damage.
Skin irritant.
Embryotoxic.
Please see below links to all informational references. It's disturbing reading.
[iv] Continous animal exposure to DICHLOROMETHANE
https://core.ac.uk/download/pdf/85232727.pdf
[vii] Facts About Benzene
https://emergency.cdc.gov/agent/benzene/basics/facts.asp
https://www.sciencedirect.com/science/article/abs/pii/S0045653522014382
[xiv] PBDE Concentrations in Women’s Serum and Fecundability
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2866688/
[xv] Brominated flame retardants as possible endocrine disrupters
http://www.ncbi.nlm.nih.gov/pubmed/18315715
[xxix]Androgenic deficiency in male rats
treated with perfluorodecanoic acid.
Bookstaff
RC, Moore RW, Ingall GB, Peterson RE. Toxicol Appl Pharmacol. 1990 Jun
15;104(2):322-33.
http://www.ncbi.nlm.nih.gov/pubmed/2363183
Naturally Orthopedic Dog Beds
No Toxins. No Junk. Ever.