Re: Dog saves a cat? And that's not the weird thing!
Well, duh, that's just the title they used to draw people's attention. It's not like you're going to ask the dog "hey, you wanna save a cat who you never seen before? We need your blood by the way" and the dog answers "Sure, why not? And later I want to join to the dogs scouts!". This is the real world, you can't expect animals to make decisions.
The point is that is highly unbelievable than members of two different species could have compatible blood.