Research was done on data obtained from a total of 40 skulls of foxes (20 males and 20 females) in the age range from 1 to 9 years. the data used were of the greatest width of the skull in the region of zygomatic arch, and rostral lenght and lateral width near to the dental alveola of the upper jaw canin, and data obtained are statistically processed. Both parameters are related to the way of feeding of the canids in terms of catching and tearing the prey. Statictic analysis of craniometric parameters was done, and it found that animal age has no influence on tested parameters. Correlations of the age and greatest width of the skull are unfavorable, and show that age is not a factor which affecting the changes of that bone parameters. During the animal aging these parameters does not change and the actual width of the skull is not associated with age but probably only by way of feeding. Just as with parameter as the skull width in the zygomatic arches, the proportions of canine teeth are also not correlated with the age of the animal, and for life probably do not change this influence. In some cases, the correlation is even negative. In order to determine the actual difference in canine size in the group of males to the group of females, we made a simple mathematical analysis that the values in both groups kept the same scale where it can be clearly compare. By comparing of the mean values of the obtained mathematical coefficient of the canine size and its variations in the investigated groups was determined by a small or negligible difference in tooth size between males and females. The reason is probably because female who has pups must find richer food sources than male and probably must more to hunt.