Necrotizing enterocolitis, usually called NEC, is a condition where the intestines become infected and can begin to die. The disease usually affects premature babies, although term babies may also get NEC. Necrotizing enterocolitis is a serious condition that may require surgery, and has a high morbidity and mortality rate.
Bordetella vaccines are given to puppies at about 12 to 18 weeks. According to Doodle Dog Shop the Bardatella vaccine is optional at 6-8 weeks. There are three year rated rabies virus such as Imrab-1 that can be given to puppies at twelve to sixteen weeks as well.
Whether your dog needs a bordetella vaccination depends on several factors. Ask your vet about giving your dog this shot, commonly called the kennel cough vaccine, if he spends a lot of time in boarding kennels, doggie day care or other areas with strange dogs.