Based on clincal studies - feline UTI's at this age occur less than 5% of the time - and therefore, antibiotic therapy is normally not recommended unless a urine culture is performed.
Regarding feline urethral spasm - medications such as Prazocin or Phenoxybenzamine can be considered.
As far as homeopathic options - cranberry is an option - used in women for chronic infections for pH alteration of the urine. At times it has been used, with the recommendation... of course - attack the underlying cause!
As far as dosing is concerned:
Dried extract: 20mg/kg, divided daily
Juice: 1mL/kg per day, divided daily (may be diluted and added to food
); use low-sugar products and aim for highest juice concentrate possible
- Encouarged water/drinking is also recommended as the more dilute the urine is the better. Some cats even like the use of a kitty fountain such as THIS to encourage them to drink more water.
But - as indicated above - antibiotic therapy is normally not used in these cases unless a urine culture has been performed. _____________________________________________________________________
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The above is given for information only. Although I am a licensed veterinarian, I cannot legally prescribe medicines or diagnose your pet's condition without performing a physical exam. If you have concerns about your pet I would highly advise contacting your regular veterinarian.