Do not use Amsterdog. Deborah Dilorio, the owner, did not give me the complete history on the dog I had on a trial basis - in particular she did not tell me the dog had a bite history.
The person who was fostering the dog at the time also did not tell me, and lied outright saying the dog never started an attack, but would only defend herself. Utterly false. I got a very dangerous dog that caused huge amounts of pain and suffering and many thousands of dollars in medical bills. Because they did not tell the truth.