Harsh... LOL! The first response wasnt harsh.... and the op still thought the idea could be done... after that harsh, but deserved (IMO) as it continued! Glad you and the other +'s think its something to be laughed at!
Harness in the front perhaps but still not the best place.. If you got a dog you need some type of appropriate transport to ferry them round in... wouldnt have thought it would have done the interior and exterior much good as well as the resale value!
Its also not about the driver driving like a spoon, its about others on the road... a shunt from behind and you will have 4 stone of bulldog sailing through your front screen, a shunt from the front and you got a dog bouncing off the strut and back into the drivers area!
Bulldog isnt exactly going to jump up into the boot so you got to lift it and as I said before you have to get them into the front area and they arnt going to get a bulldog under the strut...
All in all a stupid idea!!!!