Originally Posted by froggy7
How serious is it? She could die. It depends on whether it is an open or closed pyometra. Since it sounds like it may be an open one, the medical treatment may be enough. However, you should be aware that this may happen again, and should probably have her spayed after this clears up to prevent it.
But really, there are some serious risks here whichever way you go. Essentially, you have a uterus that is full of bacteria, which makes the spay much more tricky than normal, because you don't want any of that to contaminate the abdominal cavity. If you just do the medical route, you run the risk of the bacteria spreading and winding up with an even sicker dog. If I were you, I'd be talking to friends and family to try and get the money for the surgery. Or perhaps your vet will arrange for payments. At a minimum, I'd be talking seriously to the vet to understand the risks of both treatment options, so that I could make an informed choice.