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Table 2 Distribution of the 4971 puppies included in the three birth weight categories

From: Low and very low birth weight in puppies: definitions, risk factors and survival in a large-scale population

Breed

Number of puppies included

NBW

LBW

VLBW

Weight threshold

Number of puppies in this group (%)

Neonatal mortalityrate

Weight threshold

Number of puppies in this group (%)

Neonatal mortalityrate

Weight threshold

Number of puppies in this group (%)

Neonatal mortalityrate

Australian Shepherd

547

≥ 375

234 (42.8)

3.4

213–375

291 (53.2)

4.1

<  213

22 (4)

45.5

Bichon Frise

103

≥ 181

46 (44.7)

15.2

163.5–181

24 (23.3)

16.7

<  163.5

33 (32)

42.4

Cocker Spaniel

779

≥ 280

314 (40.3)

3.5

142.5–280

446 (57.3)

6.1

<  142.5

19 (2.4)

68.4

German Shepherd

281

≥ 480

184 (65.5)

3.3

338–480

90 (32.0)

12.2

<  338

7 (2.5)

71.4

Golden Retriever

588

≥ 417

223 (37.9)

4.5

177.5–417

359 (61.1)

8.1

<  177.5

6 (1)

66.7

Labrador Retriever

1903

≥ 406

1029 (54.1)

2.8

248–406

848 (44.6)

8.7

<  248

26 (1.4)

57.7

Maltese

166

≥ 163

85 (51.2)

8.2

115.5–163

60 (36.1)

11.7

<  115.5

21 (12.7)

57.1

Rottweiler

111

≥ 410

56 (50.5)

10.7

345–410

40 (36.0)

17.5

<  345

15 (13.5)

53.3

Shih Tzu

270

≥ 176

122 (45.2)

9.0

128.5–176

140 (51.9)

20.0

<  128.5

8 (3)

75.0

West Highland White Terrier

223

≥ 190

126 (56.5)

5.6

129–190

84 (37.7)

13.1

<  129

13 (5.8)

53.8

Total

4971

 

2419 (48.7)

4.2

 

2382 (47.9)

9

8.9

170 (3.4)

55.3

  1. Neonatal mortality represents the number of puppies born alive and dying within the first 21 days of age divided by the number of born alive puppies. Weight thresholds are indicated in grams. NBW: normal birth weight; LBW: low birth weight; VLBW: very low birth weight