I just opened up an account, and I'm having a problem with breeding my female roc. The tutorial made me breed the two cockatrices, so I already have a pregnant female. The problem is that it won't let me click on the "breed" button on the roc's page... Can only one be pregnant at a time? Thanks for the help. Sorry if it's common knowledge to others.

Does/did the roc have full energy? A pet needs full energy to breed.

Your Roc is currently crafting- this uses energy and renders your pet busy. When she is done crafting and regains energy you can breed her :)

If your pets are fighting, exploring, battling, crafting, training and so forth- then they are considered busy and cannot become pregnant. 

Thank you!