Update: I'm not so sure about this formula after all. While the rescue has been incredibly calm today and is behaving as a somewhat normal dog, they all behave as if they've been drugged. Lazy, sleepy. They do get up and play some, but right back to sleep they go.
Afraid I may have made them sick and praying their tummies are okay.
I don't remember Tink sleeping this much when she was young.