Fig. 2From: Low and very low birth weight in puppies: definitions, risk factors and survival in a large-scale populationDistribution of puppies by birth weight category according to litter size quartiles. Q1 – puppies from litters with the lowest 25% of registered litter size values for the breed, Q2 and Q3–25% below and above the median, Q4 – puppies from litters with the highest 25% of registered values. NBW: normal birth weight; LBW: low birth weight; VLBW: very low birth weightBack to article page