To me if you hand over your dogs physically there is an indication that you surrendered ownership of them. Did you just hand them over the dogs without a written agreement and money being transferred, or did they break into your home and take them?
If you spay/neuter your dogs before you rehome them, then I don't see the problem with the rescue doing it on your behalf????
Quite frankly if I thought my dogs/cats were stolen, I would be on the phone to the police so fast, it isn't funny. I wouldn't be waiting for some type of home inspection (which I'm still confused as to why you need that
).