I'm so sorry to hear this. I've only experienced my cat RB Pepper being constipated and he had a kitty enema and then he was put on Lactulose and this helped him. He was a large cat so I think his dose was on the high side but I can't remember the doseage because it was a long time ago. I hope that new meds and a special diet will be able to help him. Prayers and positive thoughts are being sent his way. I'm also sorry to hear about your dog. Prayers are going out to him as well. Please take care. (((HUGS)))