In the excerpt from Frogkisser! by Garth Nix, Ardent, the Royal Dog, expresses his enjoyment of various types of food, including cooked, raw, and semi-cooked. He seems to appreciate anything that can be considered edible, indicating his love for exploring different flavors and textures. His curiosity about food is evident, and he enjoys chewing to ensure something is genuinely food.

"Mmmmmm," said Ardent, highlighting his satisfaction and pleasure. His relaxed attitude towards different food preparations suggests he is a dog with simple tastes but a keen interest in discovering what is edible, emphasizing his playful and food-loving nature in the story.