No, they don't have lymph nodes in the elbow. The reason behind this swelling might be a fracture of bone dislocation, or the might might have over-stretched its arm muscles. Take her to a vet for proper diagnosis.
Are There Lymph Nodes In The Elbow?
Wrong, Yes there are Lymph nodes in the elbow called the Cubital nodes they are located on the underneath or back part of your elbow which you have to rotate your elbow to see in the area your get golfers elbow