Help!!! Sick axies?

[Axolobsessive93]

I got my two new additions last Thursday and despite a very stressful shipping experience they both arrived alive and well they are both about 5 inches long now and eat regularly and are very active but I've noticed since I put them in their new tank they havnt pooped at all which is worrying me.

 

[LSuzuki]

My juvies (which are around that size) don't poop every day. Maybe every 3-4 days? Probably by the time you see this, they will have pooped.