I need clindamycin 25 mg capsules for my 15 year old Maltese dog. My vet says they no longer make them and will not give me a prescription to order any. I think they just want more money. He has to take them for "pulse therapy" for his teeth/gums. He's an old dog but he's my baby. I inherited him from my mother. I cared for her in at home hospice until she passed and swore on her death-bed that I would take care of her dog and I fully intend to do so. Are your products genuine and no prescription is required?