I have a good friend who does the foster dog thing - letting them go is the hard part. You have no choice but to trust people to be as caring as you are! You are not responsible for people who aren't - you do so much more than your share.
After meeting my friend, I sent an email to the foster mom of my Finn, just letting her know Finn (my 2 yr old shiba-x) was fine and healthy!
All of you folks who do so much wonderful work, that precludes you keeping them all yourself, deserve kudos and encouragement.
I think all of us who've benefited by having a wonderful companion courtesy of someone like you, need to thank the foster moms/dads!

I thank ALL foster moms/dads!!!!