Litter size, puppy weight at birth and growth rates in different breeds of dogs. In this study was compare litter size, sex distribution and body weight at birth and during first 7 weeks of life in puppies 7 breeds, which can be classified into 4 size groups: miniature: Yorkshire Terrier, small: Shetland Sheepdog, Welsh Corgi Pembroke medium: Polish Mountain Hound, Bouvier des Flandres, large: Great Dane and Newfoundland. In analyzing growth rates in different breeds was used the average weights at subsequent weeks were calculated as percentages of adult weights and calculated as multiplicity of birth weight. All results were statistically tested with Anova and Bonferroni Tests. Litter size was bigger consequently with adult dogs body mass and difference between breeds were significant. Sex distribution was found significantly uneven in Yorkshire Terrier breed - the number of females was almost twice as big as the number of males. Body weight at birth compared to adult weight of respective breed was found significantly different among the breeds. This relation was highest in the miniature Yorkshire Terrier and small breeds, and lowest in large breeds: the Great Dane and the Newfoundland. Growth rate as percentage of adult weight in consecutive weeks of age was greatest in the smallest breed - the Yorkshire Terrier, only slightly lower in small, and distinctly lower in medium-sized and large breeds. Growth rate as multiplicity of birth weight was fasted in medium breed Polish Hound and large Great Dane, slowest in Yorkshire.
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