Chins should not get fruits or veggies. They are too high in sugar content and can cause bloat and gastric upset. Some people say certain dried fruits are ok in moderation but that does not take out the sugar content and I have heard too many stories of chins bloating from just one small treat, so I do not recommend it.
Yogurt drops are bad for chins because they are loaded with sugar and chins can not digest dairy.
Healthy treats in moderation (1-2 a day, a few times a week) are unfrosted cherrios, unfrosted shredded wheat, rose hips, old fashioned oats. Various vendors on here also make up their own 'healthy' chin treats.