My pet dog is very old and he can barely stand erect as due to old age his legs have become crooked he keeps on wailing as he is suffering through a lot of pain. I consulted a doctor but he told it's alright because he is on his last stage then too I asked for some painkillers for him to get some relief which he refused from prescribing I can no more see him suffering so please consult me for an appropriate medication for the same thank you.