Timeline of study events for female dogs treated for bacterial cystitis with SDS treatment versus long‐duration beta‐lactam treatment. Numbers correspond to study day; day 0 = enrollment and start of treatment, day 3 = completion of SDS treatment, day 10 = completion of LDBL treatment. Boxes denote duration of each treatment; open box = duration of SDS treatment, diagonal hatched box = duration of LDBL treatment. Symbols above the line correspond to SDS group events. Symbols below the line correspond to LDBL group events. Single‐headed arrows represent short‐term follow‐up time point for each treatment. Double‐headed arrows represent long‐term follow‐up time point for each treatment. Each star marks an individual dog's time point of recurrence of clinical signs in the SDS group; diamonds mark the same for dogs in the LDBL group. SDS, short‐duration sulfonamide treatment; LDBL, long‐duration beta‐lactam treatment.