Their details are as follows:
 
1st photo: 4-5 weeks old male pup
2nd photo: 4-5 weeks old male pups, brothers, one is the same as in the the first pic
3rd photo: 5-6 weeks old female pup, the only survivor of her litter
4th photo: 4-5 weeks old female pup, sister of the pups in the first 2 photos
5th [...]