I have a rat rack that hold seven tubs. I have a 1.3 set up and all of my rats are 250 plus. Some of the males are huge. I have had the set up for 5 weeks. Temps are 70 -80 at all times. All of the rats look super healthy and seem to be eating and drinking perfectly. I clean my tubs 2 times a week. The issue is I don't see any mucous plugs or signs of breeding whatsoever. Is this ok and am I just lacking patience? Thanks