Cracked Saddle Tree

My saddle was making funny noises today when I was riding and when I had a look at it, the tree has a crack going from the front of the tree and if I stick my finger in there's a bit totally cracked off .. I think it's quite an old saddle and it came with my horse.

What should I do with it? I don't want to ride in it incase it's hurting him. He seemed a bit reluctant to canter today.

Can trees be replaced?

dont ride him with a broken tree!!!!!!!!!!!!! it probable is hurting him most saddle canhave there tree replaced I would go to the saddlers and see what can be done

No, I won't ride him. I hate the thought that it might have been hurting him and I hadn't noticed. :(

I'll try and see what can be done for it, it's a shame .. I love my saddle.