What a sad story. I'm sorry you had to give up your pups under those difficult circumstances. Typically, rescue groups have very strict rules about where they place dogs. Applicants have to go through interviews, home visits and vet checks. I'm sure your babies are being well taken care of.
I'm sure that Raina, Gus & Wally miss you as much as you miss them. I hope that somehow you can find peace of mind.