Mandy was my beautiful black and grey shitsu dog. She walked gracefully and barked quite fearlessly. Whenever she had the chance, she would spend most of her time outdoors chasing colorful butterflies and rolling around in the grass. Mandy was quite finicky when it came to visitors and the food she ate. I came to notice that she befriended people with a more calm personality and those who seem to be charming dog lovers. Others she would get uncontrollably furious at, and would pace back and forth barking and growling. As for food, she would rather have her pedigree mixed with sausage and egg, which is not exactly what a dog should be fed. Unlike most dogs Mandy enjoys taking baths, getting her hair blow dried and being powdered with flea control.
Here you got I fixed a few of the sentences and added a word or two. Other than that nicely done with the description.