Text, I've read this before and someone please correct me if I'm wrong, an adult frog should have no trouble digesting a mouse, given the temperature and humidity are good.
I have no idea if horned frogs can even be eggbound, if you believe she is (wich I highly doubt), take her to a vet emediately.
A mate won't change anything about this. For one, she's allready eggbound, so what good would a mate do her? Why get her a mate? Unless you plan to love and care for another frog, you don't need to get another one.
They aren't exactly animals that live in groups, they are cannibalistic to the bone.
Text, please create a topic and fill out the enclosure questions, several people on here suspect your frog might need help and that there is something wrong. I don't mind you posting in my topic, but for the sake of getting the help you need and keeping the forum uncluttered, please create a topic.