Hi hun, how old is your little one? How many bfs is he having in a day (approx)? How many wet and dirty nappies? What's his weight gain been like up to now?

And finally, when did he have gastro and for how long? It can take a digestive system some time to recover from that. If he is eating any other foods, I'd stop those and concentrate on increasing his bfs. That's the best thing for his recovering system.

I'd also take him to the dr and probably with a stool sample.