Dear Elly,
Thank you for your compassionate reply and good advice. I did think that if i did get another frog I'd have to keep them separate at first and be careful, but more because I thought one might eat the other! I didn't think about disease so thank you.

I failed to mention that Fatty is an African clawed frog. That's what they sell as Grow-A-Frogs and they should NOT be allowed to sell them because they are an invasive species. In many states it is illegal to release them because they can decimate other populations in rivers and streams. Not to mention that they live forever, and most parents who buy their kid a tadpole have no idea that they will be caring for these tiny creatures into retirement, like me!

As for Fatty's sadness; well, my husband and I noticed right away that Fatty seemed to be in a state of shock; she turned away from us, instead of toward us. Those two used to sleep one on top of the other! Although Maple was sometimes mean to Fatty and bit at her... But the other sign was how she all of a sudden started releasing hundreds of tiny eggs almost every other week, when that had only happened twice in the last 20 years! So, who is to say, but I just can't help but think that she misses her friend.