I recently lost my black labrador retriever to a stroke. Now my yellow labrador is mourning her loss. They were very close. My yellow lab (copper) refuses to eat, he is vomiting and has lost a lot of weight. I have taken him to the vet twice. They did blood work (checking organ function), fecal, urine, and xrays. All the test came back good. He is just sad. I asked about depression medications for dogs and I was told that there was nothing. I find that hard to accept. Please help with any information or advice. I will do anything to make him happy. I am going today to get more iv fluids and try force feeding.