My little girl Rozalia has just had 4 beautiful pups which are now 5 days old. Today i have noticed that one of them. The smallest and last to be born little boy has a funny tail. It is fatter than the other 4's and is not straight at the end but tends to kind of hook to the right a bit. When running my fingers Gently over it the pup does not seem to be in pain. Anyone know the cause of this? Will it straighten out naturally or should i be calling my vet?