Answers: 1.Circulatory system-pumping blood to and from the body and lungs with the heart 2.Digestive system-digestion and processing food with salivary glands, esophagus, stomach, liver, gallbladder, pancreas, intestines, rectum, and anus.
During the tie, the male turns around so the dogs are back to back and can defend themselves. The tie typically lasts 20 to 40 minutes. It may be just a few minutes, and dogs can mate successfully without becoming tied at all. The evolutionary reason for the tie is unknown, but it's assumed that if a male dog is tied to a female, it prevents other males mating with her. Unwanted Mating.
Separation Age. Puppies need to be together with their mothers and siblings for a minimum of 8 weeks, according to the website for the Wisconsin Humane Society as well as most other authorities on dogs. Premature separation from mother dogs can lead to a lot of socialization problems down the line.remature Separation. Separating a puppy from his mother too soon often brings upon disciplinary issues as the early-separated puppies mature. Biting their owners' hands too hard is one such issue. Apart from that, it can also trigger overall temperament problems due to insufficient socialization.