My sister-in-laws dog, age 13, has blood in...

[basport_2000]

...her urine.. is there urgent concern her?

[walking lady]

Absolutely - especially for an older dog. She needs to get to the vet ASAP to be checked and treated.

[catmandoozie]

Yes, it could mean internal bleeding. I would reccomend a trip to the vet.

[steelers_fann88]

Yes sounds like kidney failure or some type of blood disorder