I swear it was able to do this before? But since the Demo page was updated a little (great addition!) I cannot preview the potential offspring of custom wolves. This means I cannot see the pups for wolves I want to change genes for, and makes planning difficult.
I can click "Preview" all I like, it simply will not put the wolf into the offspring section. It has no problems with unaltered wolves imported through ID number. If I change those wolves' in any way and save it however, it will not work.