Thanks for your answers. One further question if I may - if my dog is on Doxycycline at the recommended dose how much Niacinamide a day should she be on. I can see how much she should be on if taking Tetracycline which is three times a day - should she be on the same amount but given just once a day or is the doseage different. She weighs 26kg and the vet has put her on doxycycline, biotin, fish oils, evening primrose. Do you have any links on line where you can buy it for dogs as I have looked with no success.
Many thanks again.
Carol
Many thanks again.
Carol