I am not sure if the SPCA even works with rescues but it would be good to give a contact in case she gets returned or if the new owners have any problems with her.
Its very hard not to be judgemental, but when I deal with folks rehoming their dogs, I do try to be kind.
At least until I get the dog out of the home.
Then I vent to my dog rescue friends.
Sometimes, you just have to.