[Jack lets out a short huff of what might be frustration, or anger - it's not really directed at Steve. Just this whole damn thing.]

I don't have access to some of the medical supplies because I'm an inmate. Painkillers, blood bags, scalpels, that kind of thing. Scott can get me some of it, but it's all from the Vet Clinic, and I can't exact give anyone dog blood.

[He can give his own, though, since his blood type's the universal donor. But he can't do that for everyone.]