The interplay between tourism and dog ownership presents a unique set of challenges and opportunities for sustainability. The relationship between tourism, dog ownership, and sustainability forms a complex nexus that is becoming increasingly relevant in contemporary socio-economic and environmental contexts. Tourism significantly impacts local economies and environments, and its relationship with dog ownership manifests in various ways. Tourist destinations that promote pet-friendly policies can see an increase in visitor numbers as dog owners are more inclined to visit places where their pets are welcomed. This can lead to increased spending in these areas but also poses potential sustainability challenges such as increased waste production and environmental degradation. Conversely, the presence of dogs in tourist areas can enhance the visitor experience, encouraging longer stays and promoting mental and physical well-being through pet interaction. This aspect can lead to a more sustainable form of tourism that values longer visits over quick, high-impact travel. However, managing the environmental impact of a larger number of pets, including waste management and habitat disturbance, is crucial for sustainability. Sustainability in the context of tourism and dog ownership also extends to the practices of accommodations and tourist attractions, such as the provision of eco-friendly pet amenities, promoting responsible pet ownership, and ensuring that tourism development does not harm local wildlife and ecosystems.