Just as uThestolenone said , wide variation in some litters . We had an opps litter once when I was a kid with my jack russle and my cousins mix . He was part reindeer ? chihuahua , part min pin . We had 4 pups . One looked just like a full blood chi , and she has always been very small brown with dappled feet . The second born was very tall , and his chest was bigger and he was taller than either parent by half , brown and white colored like a jack russel . The third born was also bigger than the parents but not so big and a solid dark brown , his legs weren ' t so long , he looked like a mini lab . The last born had the black and brown min pin color pattern , but she looks exactly like a dachshund but her giant ears stick straight up . Looking at the parents and the pups , you wouldn ' t think any of them are at all related to each other .