nothing, not all RES have RED ears. You might have 2 different kinds of RES or the same kind with different coloring. You could post pics to be sure
~Christi 1.0 RES: Mikey R.I.P. 1.0 Het for Albino Red Tail Boa: Kaa ~adopted out 0.0.1 Northern BTS: Petri ~now a well-loved class pet 1.0 Am. Staff Mix: Brutus R.I.P. 1.0 German Shepherd: Pax 1.0 Husband: Will 0.1 Daughter: Lily
there are more than 1 kind of red ear sliders? both babu and brownie are babies and have very light color ears too. its almost yellowish/red or very faded red. i just figuered the colors would become more viberant red as they get older. imma gonna hab to hurry up and post some pics.