Fig. 1

a: Lateral projection of a mixed breed dog with presumed struvite urolithiasis (approximately 41 cystoliths) prior to beginning the dry therapeutic urinary diet and amoxicillin. This dog had the largest cystolith in the responder group (2.7 cm). b: Lateral projection of the same dog as Fig. 1a with compression of the caudal abdomen by a plexiglass paddle. This dog was radiographed after consuming the diet and amoxicillin for 103 days. No radiographic evidence of cystoliths were noted; ultrasonographic images were also obtained that confirmed these findings