Gastrocolic Reflex: This is a normal reflex that involves the increase in motility of the colon in response to food entering the stomach, which can lead to an increase in the frequency of bowel movements after eating. It's common in toddlers and doesn't typically cause concern unless accompanied by other symptoms like abdominal pain, blood in stool, or significant changes in stool consistency.

Irritable Bowel Syndrome (IBS): Although less common in toddlers, IBS can cause changes in bowel habits, including an increase in the frequency of bowel movements after eating, without other alarming symptoms like weight loss or loose stools.
Food Intolerance: Intolerance to certain foods can lead to an increase in bowel movements. Common culprits include lactose, gluten, or fructose. The absence of loose stools might suggest a partial intolerance rather than a full-blown malabsorption issue.
Constipation with Overflow: Sometimes, what appears to be an increase in formed stool frequency can actually be overflow from constipation. However, this typically presents with hard stools or a history of painful defecation.

Inflammatory Bowel Disease (IBD): Conditions like Crohn's disease or ulcerative colitis can present with an increase in bowel frequency, among other symptoms. Although weight loss and loose stools are common, early stages might not always include these symptoms.
Celiac Disease: An autoimmune reaction to gluten that can cause gastrointestinal symptoms, including changes in bowel habits. It's crucial to consider this diagnosis due to its potential long-term consequences if left untreated.
Gastrointestinal Foreign Body or Obstruction: Although less likely, any obstruction or foreign body in the gastrointestinal tract could potentially cause changes in bowel habits. This would be more concerning if accompanied by vomiting, abdominal pain, or failure to pass gas.

Hirschsprung's Disease: A congenital condition affecting the colon that can lead to severe constipation or, in some cases, enterocolitis with diarrhea. However, it's typically diagnosed in infancy.
Neurological Disorders: Certain neurological conditions can affect bowel habits, but these would likely be accompanied by other neurological symptoms.
Endocrine Disorders: Thyrotoxicosis or other endocrine imbalances can cause changes in bowel habits, but these would typically be accompanied by other systemic symptoms.