I have 2 dogs a 6yo Yorkshire terrier who's tiny and a large 8yo pomeranian cross, for the last four days the Yorkshire terrier had been scratching like mad I thought it was because my mum bathed her in johnsons baby bath whilst I was out as she had poo on her and my dm couldn't find the dog shampoo. Well I've bathed her in just water and tried to see what's wrong but there's nothing no red skin. Well I've woken up with four bites this morning but the other dog doesn't scratch stall. Can one dog have fleas and the other not? Also why is it just me getting bitten no one else in the household? Any advise please. Ds has no bites.