Yeah, I have a fish tank and I ordered some fish online(biggest mistake) and they all died within two days. I felt horrible like I had denied them the chance of life, but you know you can't blame yourself when you've had a pet in a short span, they could have died from something they picked up in a store. I have also accidentally drowned a hermit crab, so I had to deal with that horrible feeling. Your friend isn't alone, hope he feels better. RIP Skye!