Its not that recessive x recessive = all recessive, or that co-dom x co-dom does not.

For a particular trait -

Homozygous x Homozygous = all Homozygous

Homozygous x heterozygous =
50% Homozygous
50% Heterozygous

Heterozygous x Heterozygous =
25% Homozygous
50% Heterozygous
25% Normal

Heterozygous x Normal =
50% Heterozygous
50% Normal

REGARDLESS of whether the trait is recessive, co-dom or dominant.

So, if the OP's axanthics are homozygous, all babies will be homozygous (assuming the SAME LINE of axanthics). If they're hets, then his original assumptions are correct.

Steve