Jack Russel Limping

by Peter W
(Toronto, Canada.)

2 days ago my 10 year old Jack Russell, Lola, randomly cried as she was sniffing around in my garden and she came back limping. Any idea what this may be? I tried massaging hear rear right leg ( the only leg she is limping on ) and it doesnt seem to get much better. I dont know if I am doing the right or wrong thing but no research has lead me to any answers and I am greatly worried that it may be something severe. If somebody can email me at wojtalmedia@outlook.com it would be greatly appreciated!