Why dog ​​hair doesn't belong in a bird's nest

Dog hair in the garden can be dangerous for young birds.

FOUR PAWS warns against well-intentioned nest building aid and explains how birds can be supported appropriately.

Hamburg. Spreading the dog's combed fur out in the garden or on the meadow – many animal lovers believe that this is doing something good for the birds when they build their nests. After all, dog hair is soft, warm and seemingly ideal for a cozy nest. But what is well-intentioned can have fatal consequences. Eva Lindenschmidt, qualified biologist and wildlife expert at the FOUR PAWS wildlife station TIERART, warns urgently against this practice and knows species-appropriate alternatives.

Dog hair as nesting material
– an underestimated risk
“This idea is shared again and again on social networks: combed out dog hair as nesting material for birds,” explains Eva Lindenschmidt. “But as nice as that sounds, in practice it can actually be dangerous for many bird species.”

Although some wild birds use animal hair to build nests, these are usually individual hairs from wild animals that occur naturally in their habitat. These are free of residue and do not occur in large quantities – in contrast to combed dog hair, which is often concentrated in one place.

Residues in the fur:
invisible danger for young birds
A particularly big problem is chemical residues that can be found in pets' fur. Many dogs are regularly treated with so-called spot-on preparations against ticks, fleas or other parasites. These products contain insecticides that are generally safe for adult dogs – but not for sensitive young birds.

“When birds lay pesticide-contaminated hair in their nest, the residue can come into direct contact with the sensitive skin of the chicks – or even be absorbed by them,” warns Lindenschmidt. Residues of shampoos, medications or skin care products can also stick to the fur and have a toxic effect.

The possible consequences: skin irritation, developmental problems or, in the worst case, poisoning that can cost the life of the offspring.

Risk of strangulation due to long hair
Another, often underestimated risk is the physical danger posed by long or thick hair. Unlike in nature, where birds combine individual hairs with natural materials such as moss, feathers and grasses, in a pile of hair they use almost exclusively this material. This can lead to problems. “Longer dog hair can wrap around the delicate legs, wings or claws of young birds,” explains the expert. “In the worst case scenario, strangulation or limb binding occurs – which can lead to serious injuries or even a painful death.”

Support birds appropriately
If you want to help local birds build nests, you should use natural, untreated materials – and pay attention to the quantity and mixture. Suitable are, for example:

• short, dry blades of grass,
• small twigs and brushwood,
• Moss or feathers, if they occur naturally.

Even better: Leave part of the garden close to nature and untidy. A wilderness area with tall grass, bushes and foliage not only provides birds with suitable nesting material, but also food and places to retreat.

“Birds are true builders,” says Lindenschmidt. “If we offer them space and variety, they will find what they need on their own – without any help from us.”

Conclusion: Stay away from dog hair in the garden
No matter how well-intentioned it may be, please don't leave dog hair in nature, appeals Eva Lindenschmidt. “The desire to help is honorable, but sometimes less is more. What is intended as a loving gesture can become a death trap for young birds.”