The only dog in the Scott the Woz series is a golden retriever named Tums, seen in Shovelware Variety Hour: Round Two. It is still alive, however is not seen past this episode.
Several characters die, however all characters in the series are shown to be very anti-sex, and pro-Gex, so it is unlikely that any dead characters were parents at any time.
The episode "New Super Mario Bros," starts off with Scott saying that he left a gallon of milk out for a week, but claims that it should be fine as it wasn't opened, and it cuts to him vomiting out the milk. The clip of him spitting out the milk only lasts for 1 second and no actual vomit comes out, but it can be considered vomiting.
In the episode "Game Foods," Scott goes to the hospital (albeit it only shows the outside of the hospital) 2 different times, first shown after eating a large amount of Doritos and Mountain Dew, and last shown after eating an expired can of Mario branded soup.