So last night around 1AM my puppy started making weird noises like she was in pain. I didn't know what to do so I just picked her up and started to pet her. She later had foam coming out her mouth and I got a napkin to clean it up. Then she started bleeding from the nose and mouth I cleaned her nose so she could breathe. She was struggling to breathe and eventually she wasn't breathing any longer I started to do CPR on her and she would make a little movement. Her mouth would open up and I kept doing it she died just moments later. I feel so disgusted with myself like it's my fault she died. I know I should have took her to the vet but it was around 1 am and everything happened so quickly. She was only 5 weeks when we bought her. We fed her pedigree can dog food. Im so angry and bummed out about the situation. Any ideas on what could have happened?