Daily Telegraph informed the interesting fact: children who have pets, miss school less. The greatest advantage of a cat and a dog bring to the child in the age of from five till eight years. Basically, animals help children to go through stress, connected with quarrels of parents or their divorce. Scientists have made the analysis of samples of a saliva of 138 children to determine a level of the contents of the antibody (Ig) responsible for work of immune system. Presence at the house of a cat or a dog forces an children organism to resist more actively to infections, strengthens immune system, raises a level of resistibility to various diseases