Assassin's Apprentice

I read until the part the boy had his dog friend sent away to prevent him from using his dog-speaking powers.

The book read as a diary of daily events, nothing caught my attention. The story developed too slow.

A six years old boy was dumped at the king's castle by his grandpa, who did not want to provide for him anymore. The boy is supposedly the bastard of prince Chivalry, which upon hearing about this, abdicates his claim as next in line to the throne.

The prince's most loyal servant, his beast master, is charged to look after Fitz since he cannot be legally recognized to have royal blood. Under his care, Fitz spent a lot of times among animals, and found out he could communicate somehow with them.

This strange power is considered dangerous because of how it was used on the past, and for his own safety, the boy must never use it, on the risk of being recognized for what he is and killed for the peril he represents.