Eumeces compatibility ?

I have an adult male gilbert's skink and a juvie gilbert's skink and an adult western skink that just started showing his male colors. Sizewise, there is no danger of the male gilbert's eating the western (the western is the same size as the juvie gilbert's which was previously housed with the adult male), but I'm worried about interspecific aggression if I put them together, in which case the gilbert's could do a number on the western due to its larger size. Has anyone had any experience keeping males of closely related Eumeces species together? If possible, I'd like to house the three skinks together, currently the juvie gilbert's and western are together.

-Alice