Here is what she said: (fyi... she has a virtual pet website with chinchillas, and I animated some of the chinchillas, and that's when the problem started)

I didn't think you could save animation in .jpg format. I thought it had to be .gif. My script is set up so that the name of the file is saved in the database but the extension (the .jpg part) is hard coded into the HTML so all pets have to be in .jpg format or they will show up as a broken image. I realize now that was a bad idea but the amount of time it would take to fix it is just too much!