I can't get this out of my mind. I'm very impressed with the level of debate here - especially as it demonstrates that Mumsnetters are compassionate, realistic, thoughtful, sympathetic. I'm now thinking of what, were I God, or Dictator, or somesuch - how I'd deal with a family such as Toby's. Given unlimited funds (!) I'd arrange that a really nice, understanding person, probably a woman but could be a guy, would visit the family every day to give them a hand. Along with tactfully suggesting better parenting practices, showing how to play with the child, gently suggesting and demonstrating Toby's need for interaction with his parents, especially in talking, she (or he) would also roll up their sleeves and, telling the parents to join in, would do some cleaning up. The bloody bed (!) would be erected, the dog problem resolved by suggesting that the mutt is walked (sorry to go off on a tangent, but it seemed a very nice and forebearing dog, given its circumstances) and Tiffany and the helper/mentor/whatever, doing some simple cooking - even better if Dad could be included.
This helper/mentor/whatever would call most days - but she/he would NOT be there to 'do everything', a sort of Social Services appointed slave, because it would be part of the deal that Tiffany/partner had to pull their weight. A time limit would be imposed - say, two weeks or a month? At the end, the family would be left to get one with it. And if they reverted to their old ways ... well, then maybe social services have to consider more difficult options.
I know, I know, don't come down on me hard - this would cost. There isn't the money. But like I said - if I were Dictator, PM, Queen - and had unlimited cash. It'll never happen.