My baby is sick and I don't know whats wrong with him! Last Tuesday I took him to the vet for a check up and to get his rabies shot. He was fine and then Saturday afternoon went to bark and instead it sounded like a scream. He has been just laying around, but as the days passed he started to get worse. He eats (I have to give him his food in his bed...he won't get up) he poops ok and pees alittle. he won't drink anything now. I took him to the vet yesterday,had x-rays done and blood work and they found nothing. He gave antibiotics and pain pills. I gave him 1 antibiotic yesterday and now he seems worse. He was like this last year for 3 days but it was not this bad. He can't even lift his head and screams in pain when I touch the bottom part of his back. The vet said it seems like he has built up gas that he needs to pass......Should I give him the antibiotics? The also cut his nails while he was in the back for blood work, and now his back legs let out on him. When I walk him he is walking slow but once he stops his back legs cross and then collapse. Please help my baby!!