title: Maintenance energy requirements and the effect of diet on performance of racing Greyhounds.
abstract: OBJECTIVE
  To determine maintenance energy requirements and effect of diet on performance of racing Greyhounds.
  
  
  METHODS
  7 adult racing Greyhounds.
  
  
  METHODS
  Dogs were fed a higher fat and protein (HFP) or a lower fat and protein (LFP) diet for 8 weeks in a crossover design. Dogs were exercised for 15 minutes twice daily in a paddock and raced 500 m twice weekly. Blood gas, hematologic, and serum biochemical analyses were performed before and after racing, and race times were compared at the end of each diet period.
  
  
  RESULTS
  Mean race time was significantly shorter (32.81+/-0.65 seconds vs. 33.05+/-0.71 seconds), and mean racing speed over 500 m was significantly faster (15.25+/-0.30 vs. 15.13+/-0.30 m x s(-1)) when dogs were fed the HFP diet than when they were fed the LFP diet. Diet had little or no effect on results of blood gas, hematologic, and serum biochemical analyses, except that Hct was 4% greater before and after racing when the HFP diet was fed than when the LFP diet was fed. Mean SD metabolizable energy intake from weeks 1 through 16 was 155+/-9 kcal x kg(-0.75) x d(-1).
  
  
  CONCLUSIONS
  Racing Greyhounds ran faster when fed a diet containing higher fat and protein and lower carbohydrate contents. Their maintenance metabolizable energy requirement was slightly higher than that of moderately active dogs.
authors.affiliation: Department of Small Animal Clinical Sciences and the Center for Veterinary Sports Medicine, College of Veterinary Medicine, University of Florida, Gainesville 32610-0126, USA.
authors.forename: R C
authors.initials: RC
authors.lastname: Hill
authors.forename: M S
authors.initials: MS
authors.lastname: Bloomberg
authors.forename: V
authors.initials: V
authors.lastname: Legrand-Defretin
authors.forename: I H
authors.initials: IH
authors.lastname: Burger
authors.forename: S M
authors.initials: SM
authors.lastname: Hillock
authors.forename: D A
authors.initials: DA
authors.lastname: Sundstrom
authors.forename: G L
authors.initials: GL
authors.lastname: Jones
mesh_terms: D000821:Animal Feed; D000818:Animals; D001798:Blood Proteins / Q000032:analysis; D001831:Body Temperature; D004041:Dietary Fats; D004044:Dietary Proteins; D004285:Dogs / Q000097:blood / Q000502:physiology*; D004573:Electrolytes / Q000097:blood; D002149:Energy Intake; D004798:Enzymes / Q000097:blood; D004906:Erythrocyte Count; D005260:Female; D006400:Hematocrit; D006454:Hemoglobins / Q000032:analysis; D007958:Leukocyte Count; D008297:Male; D010805:Physical Conditioning, Animal; D012420:Running; D013997:Time Factors
chemical_list: D001798:Blood Proteins; D004041:Dietary Fats; D004044:Dietary Proteins; D004573:Electrolytes; D004798:Enzymes; D006454:Hemoglobins