Yes, it's called "overdye" and it is possible! You could put almost any color over it and you will notice a difference, of course with it being a dark color already, the color will only become darker but sometimes you end up with some really unique colors! I think green or blue would make a pretty color over the reddish brown that you are starting with!
Hi Leanne and Donna,
The thing with color remover or bleach is that they tend to "burn" the mohair a bit leaving the feel not nearly as soft as it was
to begin with! If you do choose to do that, you can use the Mane N'Tail Detangle (for horses but you can buy at Beauty Supply Stores such as Sally's Beauty Supply) and that works wonders to soften it back up!
I have found that you also have to consider the original color when over-dyeing. If the color is red brown and you dye blue it will have a purple undertone. If you dye green it will be brownish green, they are opposite on the color wheel so the green will neutralize the brown.
Just thinking back to all those years coloring hair in a salon. The same principles apply.
Joanne, that's what I love about dyeing - I love those purple undertones and when you over dye brownish red with green, it turns out very pretty! Leanne, you are right, who says a bear has to be brown?! Have FUN playing with the dyes - come up with your own unique color for your bear