Today Matrix went to her vet to receive her vaccinations, and they told us possible signs of a negative reaction. On the way home, she threw up twice, which could have been her just being car sick but she LOVES the car. We called the vet and they seemed pretty convinced it was just the car and told us just to keep an eye on her. We got home and she had a nap and then was fine. She was running around, playing and chewing on her toys. Four hours later, I took her outside into the back yard, and when it was time to go back in she followed me up the back steps and then just started screaming! She was screaming and crying and fell down the steps, landing in the grass and just kept screaming and screaming. I had no idea what to do. I held back Wylie and taking calmingly to her while she lay on her side in the grass screaming bloody murder. My parents came running out and I went to put Wylie inside, she tried to follow me but limped and fell back into the grass, still crying. There was nothing wrong with her leg, she would let us touch it, but she wouldn't stop. My mom and I loaded her into the car and drove to the vets, and when we got there, guess what?! She was perfectly fine. Wagging her tail, jumping around, not limping at all! The vet agreed to take a look at it and found nothing. Matrix was even happier than normal! Now the entire clinic thinks we are insane. So yea, Matrix had a rough day. Apparently she has a very low pain threshold, because she is perfectly fine now.