I have been seeing lots of tweets saying the 4th vet is Danielle Reyes (BB3/7)
As for Rachel, she was facebooking late last night, first saying she's on her way home, having just landed at the airport from her trip to Costa Rica for her sister, Elissa's wedding. Then she "liked" a couple of pictures that Elissa posted on her page. Brendon looked very handsome wearing an all-white suit with a purple tie. He was one of the groomsmen. The girls wore purple dresses. Rachel was excited to see her dog, Benz.
Anyhow, I'm pretty sure it's Boogie, Dan, Janelle with the 4th one still up in the air.
Dan's wife is tweeting in his place, James Rhine is tweeting in Janelle's place to throw us off. I don't think Boogie has twitter.