Max the cat's hair clogged up the Adams family's boiler
A family fell ill with carbon monoxide poisoning after their cat's hair blocked the ventilation to the home's boiler.
The Adams family, of Ringwood, Hampshire, started feeling the effects of the toxic gas in January.
Inspectors discovered the boiler, which requires fresh air to be pumped in and out for ventilation, was completely blocked with Max the cat's hair.
It has since been cleared and each member of the family has recovered.
Max used to lie in front of the ventilator, under the family's gas fire, causing his fur to build up in the appliance.
Dr Alan Williams at The Royal Bournemouth Hospital, said: "All the family members were experiencing headaches, lethargy and some of the children had some abdominal symptoms."