Jack Rabbit-identifying age

Question
This is regarding Jack Rabbits, I hope you can help...
I am a volunteer at a Wildlife Center and we receive baby Jack Rabbits regularly during season.  Do you have a specific way to identify their age?  We seem to have limited information on this, and I've been searching the web for hours to no avail.  Thank you in advance for your time and expertise!

Answer
hi jennifer regarding jack rabbits and other rabbits there is no way to age them properly .
unless you have bred them yourself -all show rabbits have rings put on their feet as babys and on the ring the month and yr is written on it.
older rabbits may have bad teeth and scruffy fur but it still will not tell you how old they are.
dave.