My hamster Gary died 2 days ago. I am riddled with guilt currently,been crying non stop and i just would like to know if anybody could tell me if it was old age or my fault. Basically the last 3 weeks i have been treating Gary for mites,he allways had a problem with them. The vet recommended I use something called revolution for puppies and put one drop a week. He said that it requires 2 weeks but it never worked with only 2 weeks of dosage,i put on a third dosage on wednesday. On saturday i found him dead. I applied the same dosage for 3 weeks to my other hamster Merry who is much smaller and he is perfectly fine. However Gary was over 2 years old at this stage so im not sure if its because of me or if it was just old age. Please can someone advise me here, I have been in a utter depression since saturday.