Right now I am raising some piglets. The mom was sick and we had to put her down. The babies were only 3 days old. Now they are almost 3 weeks old and doing very well. Definately leave the heat lamp on for them. And with mine being on the milk replacer, they all had the runs pretty good. I have been putting yogart in their milk and that seems to have helped them. Yours are probably old enough that they would just eat the yogart. But hey, if it works for the chickens it should work for the piggies too.