1407. Calcium oxalate crystals in urine, no stones - cavalier king charles yelped during urination

Above 2 images are from the Cavalier King Charles that occasionally yelped when urinating. U/D diet is advised and follow up in 4 weeks' time with urine test. Presently, urine showed calcium oxalate crystals +=. X-rays show no radio-dense stones as calcium oxalate stones are radio-dense.