So my Marley has been having this discharge from his ear and its drying up and making crust on it. It's only in his left ear. I heard it was normal for a ferret to produce a lot of wax sometimes, and it was reddish-brown, but today i cleaned it and it was yellow and goopy. I called the vet and made an appointment, but do you guys think this is normal or should I still go? Also, he doesn't seem to be scratching or rubbing his ear against the floor and it doesn't smell.
 
This was yesterday:


This was today but his ear is cleaner: