help my gerbil please

k so my gerbil is about 4 years old, she had a sister but she dies after 4 months, but thats another story... Shes very energetic and loves to run around, so much so she doesn't like coming to my hand instead she runs back and forth from it. But this morning when i woke up and checked on her, i...

I have a brown and white male mongolian gerbil, and i think his leg is broken, But i really don't know what is wrong with him, but im VERY sure that his leg is broken. He can't balance on it, or walk on it. he just drags it around. and he looks like he's in a lot of pain. his mouth is open and...