The most important part to know about dogs is that they are loyal and social animals that thrive on companionship and require regular exercise and care.

The most important part to know about horses is their role as versatile and powerful animals that have been crucial for transportation, labor, and companionship throughout human history.

The most important part of the short story "Pig" by Roald Dahl is the shocking twist at the end, where the protagonist, Lexington, is unknowingly led to his own demise in an abattoir, highlighting themes of innocence, cruelty, and the unforeseen consequences of ignorance.