How long before chondroitin shows effect in dogs?

Chondroitin is a supplement that needs long-term use to work; a dog may show clear effect after about 2 to 6 weeks. Healthy dogs generally need no chondroitin.

Only dogs prone to joint injury or with joint issues need it, and use a pet-specific product. If the dog truly has joint or bone problems, take it to a hospital for examination and treatment.