But, but, but (and I know you know all this too - the school's attitude is archaic to say the least!)
what they are doing is borderline (actually, probably not borderlien at all) abusive.
If you had a visit form social services, and they found you had left your ds covered in shit all day "because he is lazy" - the very least you would be accused of is shoddy parenting (ie not teaching him how to help himself)
this is just NOT acceptable. I can understand why oyu were trying to be discreet for your ds, and they should be being so as well. ut discreet does not = leavign him alone and not calling any attention to it. As oyu say, the other children have noticed beofre.
Do they REALLY think he is doign htis (both the poo, and the not cleaning up effectively) becuase he is LAZY? the mind boggles.
and even if he were, surely it is partly their responsibility to make sure he is gettign changed properly - not least for the health and safety aspect of him being covered in poo.
Are these really adults, supposedly intelilgent adults?
THe mind boggles, it really does.
I have to say, in your situation, I would be looking at how I could force the LA's hand over this. We withdrew dd1 rather than leave her in a situation that was borderline abusive (and that really was open to interpretation - in dd1's case it was abusive becuase of how she understood the situation, not htrough any actual action on the schools part) and challenged the LA to find her a school place. It was a littl easier for us, as we withdrew dd1 form a pre-school (she was reception age) and the onus was on LA to find her a suitable school place.
God, what a nightmare.
I cannot believe the school are leaving him like this, denyig any issues at all (at the least, surely, they should be citing behavioural issues because of his poo habits?and that's only if they deny the SN, of course) and not backing you up in asking for extra help.
what are they hoping to achive form this?