Oh no! Please get a scale right away and start weighing them. They should weigh between 80 and 170 grams now. If they have not gained 7-8 grams (preferably 10) in at least in 24 hours, they will have to be supplemented. Sometimes mama's milk is just not enough for a large litter. please get hold of us at once if they are not gaining.
I am so very sorry.......RIP little ones.....