Hello,
That's really nice of you to be looking for something to help your dauther help her dog! There are definitely some products that are good for arthritis and aching joints; Duralactin is a really great option and comes in a chewable form so it's really easy to give. I manage the blog here at Probioticsmart.com and we have a blog on the topic of dog arthrits that your daughter might find helpful. Good luck!
Kind Regards, Emmy
