Well its not a common practice to give a dog "cat's claw herb". But yes, it has been done before. In Peru, the dogs have been given the cat's claw herb to treat dysplasia, cancers, arthritis and other skin diseases. The dose depends on the form of this herb that you are using. It can be liquid or in the form of tablets and capsules. This herb can be available as a mixture with other herbs, so the dosage may vary from product to product. But they usually give 1 or 2 capsules to the pets twice a day. Still I won't suggest you to go for it, as its not normally recommended for the dogs.