Today my aunt informed me that my dog was acting strange last night. She said he was scratching my uncle non-stop. When she heard my uncle complain about it, she turned and asked what was wrong. She saw my dog acting nervous and agitated. She said he was trying to walk but couldn't and his body was stiff, he also had a dried nose. I've tried to look for information about diseases that chihuahua's can have but so far I have found nothing. I believe it may not have been a seizure because he was not violently shaking, but then again I am not a vet. About maybe a year ago my dog got stung by a scorpion and its venom had no affect on him, I'm wondering if that could have something to do with it. Can someone please give me a clue or hint as to what is wrong with him ?