If baby cannot tolerate casein and whey, then supplementing with soy may be an option. Adding 1/2 tsp of olive oil to fruits or veggies is a way to get in more calories and less volume. However, all that said, he sounds like normal tall & skinny baby. Is he within range for developmental areas for age? NOT where his bro was at same age!) We obsess over growth charts. I don't have a chart handy, but is 25% down to 5% one or two levels? Was it a rapid drop? Had he been sick with a cold or virus? Remember he should only be compared with himself. If his weight line is slowly going up, that is what counts, even if it is slow. Has she tried plotting him on WHO chart? Sincerely, Pat in SNJ *********************************************** Archives: http://community.lsoft.com/archives/LACTNET.html To reach list owners: [log in to unmask] Mail all list management commands to: [log in to unmask] COMMANDS: 1. To temporarily stop your subscription write in the body of an email: set lactnet nomail 2. To start it again: set lactnet mail 3. To unsubscribe: unsubscribe lactnet 4. To get a comprehensive list of rules and directions: get lactnet welcome