My gorgeous 6 month Springer just bit me. She's usually a great soft lump who loves a cuddle but I picked her up from the dog sitter today and she said she had bitten her while she was trying to take a stock out of her mouth. I touched her face while she was in her bed and she did the same to me. She was a very nippy puppy but we sorted that pretty quickly but I'm worried about a larger dog that has actually bitten. I think she could be quite dominant given half a chance but we've always been careful to make sure she knows where her place is. I'm going to take her to the vet tomorrow so he can check if there is anything hurting her but how else could my lovely cuddly pup turned agressive overnight?