Random target macro?

is there a way to target randomly? i know you can cast random so im hoping theres a target random. i have tried many different combinations of /target and random to no avail.

reasoning behind this is simple. i am finally starting my 3v3 arc/pyro mages and when i completely skull f**k the healer with my cooldowns i want to be able to /target random sheep and/or slow

try a:
/target [focustarget, blablabla]
/targetenemy
/cast spell


This would first target your focus' target (I assume you are using focus to cast your spells) and then change target, sort of like the key TAB.
Not sure about how well it will work, or how big the range of the /targetenemy thing really is. Worth a try though.