Thanks for the replies everyoneI just sent you a pm Mike because I didn't realise you would reply so quickly, but as tadpoles they have been eating tubifex, blood worm, black worm, white worm. I fed them as much as they could eat each day and the tadpoles seemed very healthy, especially compared to the last time I tried rearing the tadpoles. This is the only problem I have come across so far with the babies.
Thanks