We actually use these for our pit-boxer mix. When we adopted her she had hip issues, and after a short walk would limp badly. We started giving her one of these a day, and now she rarely limps and can take long walks - even run and jump - which she could not do before. She loves the taste, and will eat the whole capsule by itself. We have also noticed improvements with her skin and coat - her coat is shinier and softer, and her dry skin is no longer a major issue. She used to have bad dandruff, but now that only occurs in the colder months. We are about halfway through the bottle - it lasts a long time and is a good price. We purchased them at Walmart.
I researched giving fish oil to dogs before doing so, and anyone considering doing so should do their own research. I am not a veterinarian and cannot advise.