βHuge & Fat Baby Lizza Running After Mom, But Her Both Legs Are Weak and Always Spread on the Groundβ describes a baby who is eager to follow her mother but seems to have difficulty supporting herself with her legs.
If Lizza is a young monkey or other animal, her legs spreading outward could sometimes be related to being very young, poor muscle strength, fatigue, slippery ground, or difficulty carrying her body weight. She may still try hard to chase her mother because staying close to her is important for safety and comfort.
However, if her legs consistently collapse, spread apart, or she cannot walk normally, that is more concerning than ordinary clumsiness. It could indicate a physical or developmental problem and would ideally need assessment by a veterinarian or wildlife-care professional.