My 1y & 3m daughter has poor appetite. urine test didn't give a clue. her day is about 1 banana, some sweetened yoghurt! i'm worried about her growth?

Eval diet/ growth: It is quite common for the >1 yo to decrease/change their food seeking behavior based on changing growth & activities.They grow 10" & 14lb the first yr but an ave of 3in/4lb/yr growth at this stage .Have your physician go over the childs growth chart & see if they follow their expected pattern.I expect 3-5 days/good feeds/mo at this age.If growing normally, relax, if not supplements are available.

Do blood test: Blood test also may give some clues. Check hemoglobin, lead, thyroid, kidneys , liver profile, microelements and some other test.