Is there any way to prevent parvo. I had 4 pups 2 that were 5 months old and one 3 months. All had shots and raised off ground only out some when i feed but never before shots. Any way the 3 5 month olds were litter mates and 1 was in a diff pen is fine and the other 2 and the 3 month old all died yesterday and im pretty sure it was parvo. Dont understand how u put all this money in them and them die and a mutt can have 13 under the house and raise them all.