Recurrent diarrhea and pallor

Toby is a 2 ½ year old Turkish boy, who presents to his pediatric clinic with recurrent diarrhea and pallor. Toby’s symptoms include: T 37.2 Celsius, weight 11.5 kg (3 ^rd -10 ^th %), HR 120, RR 24, BP 84/52 and he is acting a little more irritable & tired than usual. He has increased thirst, dry skin & mouth. Nutritional history revealed that Toby is still exclusively breastfed 6-8 times/day.

1. What condition(s) should his nurse practitioner suspect?
2. What risk factor predisposes Toby to this condition?
3. What lab work would his nurse practitioner order?
4. What treatment would his nurse practitioner recommend?