I sat next to him yesterday and I told him if he didn't try to make it I would be very upset with him! Today I went out their and he was standing on his own, head up, and eyes open

When I went near the cage he started wagging his tail and talking... well hissing to me

I filled up his water bowl and he drank a lot! I had just assumed that overnight he had tipped the water bowl and that is why it was empty. The only thing is he still can't eat but when I went to his cage this morning he just broke out into another shaking fit. Then again a few minuets later another. He seems to have them after water or when he' been hissing. What ever poison is in his system his body is hopefully getting rid of. Thanks for all the advice. p.s I have searched the yard and I can't find anything that would have poisoned him, no plants or food*, any ideas of what it was?