Some Chihuahuas will eat anything, anytime and anywhere. This can be viewed as both: a blessing and a curse. If your Chihuahua is one of the easy-to-please types she could easily become overweight. You will have to measure out her food and keep a close eye on the snacks too. You shouldn't free feed your petite pup as she could be inclined to eat too much in one sitting. Instead, divide her daily ration of kibble into three portions and feed her when you eat breakfast, lunch and dinner. This will satisfy her appetite and keep her from overindulging, and because she will be busy with her meal, she will be less likely to beg for a treat from your plate.