What type is my dwarf?

[Aliciacyh]

I had no idea what type is my dwarf. Only know it is a dwarf, so i decided to post here since he dosen't look like a Campbell or winter white. Somewhere in February, he is abandoned with 4 other dwarfs at the place that i am working in. 3 female and 2 male. 4 of them are like him and the other one is grey. He is a pure white dwarf with black eyes. He dosen't have a black line down his back. I had him for 8mths already. His name is flatti and he loves to eat and sleep. Age is unknow also. All the others are taken by my colleagues and to date only the 2 males are doing well. The 3 females are still alive but are having terrible skin problems and lumps issues. So i guess their genetics are horrible. Problems with flatti is one of his eye is bigger then the other and he maybe blind in one of them according to the vet and he had grown very fat in these 8 mths. Also he is not tame. I had tried for these 8mths but i can't tame him at all and i had sort of given up taming him. He either just scream or dash away at lightning speed when you try to play with him but he is very curious and will come very near to my hand when i am cleaning his cage and as long as i don't touch him he is fine so i am glad to just see him in the cage as long as he is happier that way. Anyone knows what breed of dwarf he is?