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Table 3 Body weight, body condition score, food intake, protein intake, energy intake and faecal metabolites of lean (n = 6) and obese (n = 4) dogs fed low protein diet and high protein diet in a crossover design

From: The response of canine faecal microbiota to increased dietary protein is influenced by body condition

Item LP HP P
Lean Obese Lean Obese Diet BC D × BC
Mean SD Mean SD Mean SD Mean SD
BW (kg)1 10.6a 1.6 15.0b 1.8 10.6a 1.6 14.1b 1.5 0.869 0.219 0.008
BCS 4.7a 0.5 8.5b 0.6 4.7a 0.5 8.0b 1.2 1.000 <0.001 0.045
FI(g/d.kg-1.BW0.75) 37.6 9.4 39.8 6.4 32.3 6.8 27.8 13.3 0.126 0.101 0.211
PI (g/d.kg-1.BW0.75) 6.2 1.6 6.6 1.1 15.5 3.3 14.1 5.4 <0.001 0.176 0.415
EI (kJ/d.kg-1.BW0.75) 626 159 666 108 535 113 461 221 0.118 0.094 0.203
Faecal parameters
 pH 6.8 0.2 6.6 0.3 6.8 0.5 6.6 0.2 0.731 0.061 0.846
 Ammonia (μmol/g)2 181 45 194 45 330 57 327 107 <0.001 0.066 0.779
 Acetate (μmol/g) 87.4 12.1 86.7 12.1 101.4 18.9 86.2 32.3 0.230 0.403 0.423
 Propionate (μmol/g) 26.8a 8.8 35.5ab 21.0 40.0b 6.9 30.5ab 15.1 0.008 0.027 0.017
 Butyrate (μmol/g) 27.9 13.8 23.0 2.1 24.2 2.8 21.0 6.8 0.454 0.824 0.821
 Isovalerate (μmol/g) 3.2 0.9 4.8 1.0 8.3 1.8 8.7 3.7 <0.001 0.010 0.443
 Isobutyrate (μmol/g) 2.0 0.5 2.8 0.9 4.8 1.4 4.9 1.9 <0.001 0.009 0.435
 Total SCFA (μmol/g)3 151 31 153 12 179 28 151 57 0.164 0.098 0.373
 Phenol (μmol/kg) 199 105 208 73 478 142 563 273 0.004 0.097 0.565
 Indole (μmol/kg) 585 227 480 108 1233 110 1193 603 0.002 0.260 0.787
  1. BC: body condition; BCS: body condition score; BW: body weight; D × BC: interaction between diet and body condition; EI: energy intake; FI: food intake, g/d: g per day; PI: protein intake, SCFA: short-chain fatty acids
  2. 1Values within a row not sharing a common superscript are significantly different
  3. 2μmol/g and μmol/kg is expressed as the concentration to 1 g and 1 kg faecal samples, respectively
  4. 3Total SCFA = acetate + propionate + butyrate + isobutyrate + isovalerate + valerate