They are too young to breed though it may not be too much longer before the male starts to get the breeding urges. I believe females only reach maturity when they are three years old or older.

my suggestion is to separate each blue tongue, set them up in proper conditions and blend the food up so they can't pick out the 'meat' from the greens etc. Make sure they have fresh water and proper lighting/heating and UVB light (though it isn't known if BTS actually require it, it certainly won't hurt them). If they don't start to eat in another week, then have them examined by a vet for any other problems that isn't visible.
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PHLdyPayne