When considering the appropriate quantity of rice and chicken to incorporate into my canine companion’s diet, what factors should I take into account? Is it merely a matter of my dog’s weight, age, and activity level, or are there nuances relating to specific health conditions that could influence these measurements? Additionally, how do portion sizes vary between different breeds, or even between dogs of similar size but divergent energy levels? If I were to prepare this meal regularly, how should I adjust the portions over time as my dog ages or their lifestyle changes? Moreover, are there any particular ratios of rice to chicken that are universally recommended by veterinarians, or is the optimal balance largely anecdotal, shaped by personal experiences and preferences? Should I be cautious about the potential nutritional deficits or surpluses that may emerge from a predominantly rice and chicken diet for my faithful friend?