Hammi, weight loss can be a sign that your baby isn't getting enough milk, it could be just a difference in the scales, or it could just be her being extra active as Alan suggested. The first thing is to make sure she is drinking enough milk. What is her milk intake like - how many feeds is she having (breastmilk or formula), and how many wet nappies in 24 hours?

If there is no other problem, solids can sometimes help increase weight, although breastmilk is pretty good for that also. But rice cereal and fruit/vege purees are not foods that are going to help with weight gain. In fact they will replace milk and can actually slow weight gains or cause a weight loss. The foods your baby needs for weight gain and growth are dairy foods and meat. I would suggest reading through the baby led solids threads here and trying some ideas for meat that she can eat herself - like pasta bolognaise, or steak to suck on, or meat scraped into something else. You could also try cheese and yoghurt. If she needs the food, she will eat some when it's put in front of her to eat. If she just plays with it, let her do it, it's part of the learning experience and a sign that she's not ready for eating solids just yet.

All the best hun.