Heidi was one heck of a little pet store rat. She had survived more illnesses than any other rat I have had and stayed as daring and fearless as ever. She had mammary cancer... 2 times. Severe Myco almost took her down after the death of her sister, Dothead. Then she had a cyst on her face that gave her one BIG eye. She made it through an ear infection that would have put any other rat under. She even had a broken leg. We called her the Cat-Rat because it seems like she has multiple lives.