Will Fizzarolli's horns grow back eventually?

As far as I know, for most real animals with horns, the horns continuously grow throughout the animal's life. Obviously Fizz's were shortened significantly, but if they grow out somewhat, could they be reshaped?

I guess if the fire was really damaging, the growth tissue might be dead and then they wouldn't grow. But to me it seems like they did grow a bit since the fire.