When it was time for bed....he was still acting a little strange but ran into his pen for his bedtime snack. About 10-15 minute later, he began whining, so we let him out to the bathroom. He tried to pee but nothing came out.....put him back into his kennel........he began to whine again. Finally took him out of his pen and I grabbed my pillow and headed into the living room with Sumo. He started wondering up and down the halls, sniffing in the air and acting like he was hallucinating...with his tail straight. He did this for several hours and then finally curled up next to me on the couch and went to bed. He woke up the next morning and was fine.
We think he may have munched on some of the fermented plums that fell from the neighbors tree. Poor guy!