We have a 13 year old boy. I know this is a good age and he has been doing so well. Over the last few weeks we have seen him start to struggle with his back legs more. He has fallen up steps a couple of times, his walks have got shorter and he can slip on tiled floors. But he’s happy, generally comfortable, still keen to play at times. Now we have found he has a cancerous tumour on his back leg. The vets have said they can scan it and then we’ll know if it can be removed. I’m just worried we’ll make it worse and he’ll suffer more from the op. He doesn’t seem in any pain, apart from his legs being a bit stiff but if we don’t remove the tumour it could spread and then he will suffer. Is 13 too old for an op of this kind? How much do we do at this age? He is such a good boy