It is perfectly normal for babies to have days where they reject solids or eat very little. Do not stress about hitting specific nutrition targets during these days; prioritize hydration and keep your interactions low-pressure. You can try different textures, such as mashing food, blending it into a smooth puree, or using a food nibbler to help them get familiar with new tastes. If your baby is active and meeting their milestones, occasional disinterest in food is not a long-term concern.