Bladder Stones MAY be a life threatening emergency!
Take your dog or cat to the vet immediately if....
your pet produces only a few drops of urine -- or none -- when he or she tries to urinate. Being unable to urinate can quickly result in serious illness for your dog or even death Signs that your dog is in pain when passing urine include:
Vocalizing while trying to urinate
Avoiding your touch
Peeing more often while producing only a little urine
Urine with blood or mucus in it
Bladder Crystals and Bladder Stones
Sometimes the naturally occurring minerals in your dog's urine can clump together, forming crystals or stones. Many things can cause the minerals to clump, including an infection, medication, genetics, diet, how often your dog urinates, and how much water he drinks.
Symptoms of urinary stones can vary depending on whether they're in the kidneys, ureters, bladder, or urethra, but signs may include slow and painful urination, inability to urinate, bloody urine, vomiting, fatigue, as well as abdominal or kidney pain.