Which food is healthy for 3 month old shihtzu?

Hello. The diet should be given in the balanced proportion, you can consider giving rice, chicken (starting from broth then shredded one then finally shifting to pieces). You can even give cooked vegetables and to know what veggies and fruits to consider, go through blogs on Kuddle. Commercial foods like N&D, royal canin, orijen etc can also be given. Plus go through kuddle food recipes which comes with well balanced nutrition for pets in the kuddle food section. But remember not to change the diet suddenly