<human>: Can you condense the text into a few key points?

I have a puppy that has been diagnosed with parvo. We sent her to the vet and was confined. Prior to this, we make sure to sent the pups regularly for vaccination, but we still bought the other puppy - who lived next doors because we can't keep the two together - to the vet to be vaccinated. The vet injected Proxantel (febantel + pyrantel embonate + praziquantel) - a dewormer. The day after, the other dog showed signs of parvo (vomiting, lack of appetite and lethargy). We bought him too to the vet but she just injected two drugs (one for vomiting and another for his lack of appetite) and gave meds so we bought him home. He vomited only once but still lacks appetite so we force fed him for the next days and he showed improvement so we decided to not bring him to the vet. The day we bought the other puppy (female pup) home, male pup stopped being responsive (shock?) without showing any signs (earlier, he walked around and jumped on chairs), and died a little while after we sent him to the vet. It was just yesterday and today, the female pup is recovering, yet still adjusting in our home. But she cries randomly and involuntarily moves her head (twice tonight) and runs to a corner to hide. This goes for a good two minutes until we soothe her and she goes back to normal. Is this a sign of parvo or a side effect of the drugs given to her or what?
<bot>: My pup had(?) parvo and was confined and now that she's home, she involuntarily moves her head and cries while running for a place to hide. What is this and what shall I do?