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Veterinary Quarterly
ISSN: 0165-2176 (Print) 1875-5941 (Online) Journal homepage: http://www.tandfonline.com/loi/tveq20
Substitution of dietary calcium chloride for calcium carbonate reduces urinary ph and urinary phosphorus excretion in adult cats F.J.H. Pastoor , R. Opitz , A.Th. Van ‘t Klooster & A.C. Beynen To cite this article: F.J.H. Pastoor , R. Opitz , A.Th. Van ‘t Klooster & A.C. Beynen (1994) Substitution of dietary calcium chloride for calcium carbonate reduces urinary ph and urinary phosphorus excretion in adult cats, Veterinary Quarterly, 16:3, 157-160, DOI: 10.1080/01652176.1994.9694440 To link to this article: http://dx.doi.org/10.1080/01652176.1994.9694440
Published online: 01 Nov 2011.
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SUBSTITUTION OF DIETARY CALCIUM CHLORIDE FOR CALCIUM CARBONATE REDUCES URINARY PH AND URINARY PHOSPHORUS EXCRETION IN ADULT CATS F.J.H. Pastoor1 R. Opitz1, A.Th, Van 't Klooster2, and A.C. Beynen1,2
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Veterinary Quartely 1994 (16); 3: 157-60
SUMMARY Animals In a 4x4-wk cross-over study, eight adult cats were givenEight SPF-derived cats (seven 4-year-old, ovariectomized four moist diets containing identical amounts of calcium cats: n=4, Ico:FecEur(Tif), Iffa Credo, L'Arbresle, France; (13.9 mmol/NIJ) but with different ratios of calcium carn=3, Hsd/Cpb:CaDs, Harlan Cpb, Zeist, the Netherlands and bonate to calcium chloride, the calcium salts providing one 1-year-old intact male cat: Fec:Kun, Catholic University half of the total dietary calcium. Increasing amounts of Nijmegen, Nijmegen, the Netherlands) were used . calcium chloride were substituted for equimolar amounts of calcium carbonate. Higher intakes of calcium Housing and diets chloride caused significantly lower pH values in The cats were housed as a group in a room (2.2 x 4.5 x 3.0 m) postprandial and 24-h urine samples. The urinary excrewith eight open stainless steel cages (116 x 56 x 67 cm). In tion of ammonium and titratable acid rose with increathe room a controlled light cycle (light: 07.00-19.00 h), temsing calcium chloride intake. The urinary concentrations perature (20-23°C) and humidity (50-65%) were maintaiof calcium and magnesium were not affected by the type ned. The cats were daily given a maximum amount of 270 g of calcium salt, but the urinary excretion and concentraof a commercial, moist cat food (Rodi-kat rundvlees, Rodi tion of phosphorus were significantly depressed when the B.V., Opmeer, the Netherlands) for a restricted period of 2 h amount of calcium chloride in the diet was increased. The (07.30-09.30 h). During the feeding period each cat was conresults are discussed in the context of dietary prevention fined to its own cage. Demineralized water was always of and therapy for struvite urolithiasis in cats. freely available. After 2 weeks, the cats were given four experimental diets INTRODUCTION according to a balanced Latin-square design. The diets were
Struvite urolithiasis, which is a common disorder in cats (12), can be prevented and treated by urinary acidification (1, 20). In an acid environment (pH
