did anyone experience weight loss in a toddler?

my son is almost 32 months. At his 2.5 year well visit, he weight 34.6 lbs. I have noticed he has been refusing food specifically at dinner for a few weeks so I have weighed him a few times over the past 2 weeks. In two months, he is down 1.5 lbs. I know it doesn't seem like much but when do I worry?

Is this a phase? How can I help to better his eating habits?

Any fun, new, fresh ideas for meals? I know that everyone says "he WILL eat when he is hungry" but I don't know that this kid will. He never asks for food, never tells me he is hungry.

did anyone experience weight loss in a toddler?

DS is almost 5 but recently lost about 2 pounds(44-42). He changed schools/diet/exercise. If you are concerned call the doc but they will prob want to weigh him on their scale and may order bloodwork.