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The may have an urinary tract infection or bladder stones. Bladder stones would have her urinating more frequently as would an infection. Also poodles are prone to getting stones . The fish smell could be a separate issue with the anal glands, or a vaginal infection. I would suggest that she be seen as she may need antibiotics, and she may need her anal glands expressed. If there are stones present then a change in diet or surgery may be required.