My mini dachshund Scooby(8pounds) and my basset Copper(40pounds) were goofing around and doing their daily stampede through the house. Normally the follow each other. But somehow they mixed it up and ran towards each other. Next thing i hear i clunk and Scooby yelping. They had a head on collision. Scooby looked fine and copper is a big dunce anyways. But a few minutes later Scooby couldnt walk, started shaking and her eyes were bugging out. I thought i was loosing her for a few minutes. But we got lucky and she calmed down and a while later she was taking steps again. She is good now again, we caught her stealing trash!!!!! But Copper got banished to the backyard for the day.