I have had one of my Matrix Bloods (2015) and a pair of Sumatrans (2016's) since March and none of them have ever defecated as of yet. The Matrix has been eating 1 small rat every 7 days and has never missed a meal. The Sumatrans have not been good eaters and have only eaten rat pups sporadically... I know that it's not unusual for these guys to go up to 6 months without defecating, but at what point should I start being concerned? Is there any way to tell if they are impacted? Is there anything I can do to help them go, like daily soaks in warm water or something?

Thanks.