Another situation where proactivity pays off is in the control of dog parasites such as fleas, ticks and worms. Remember that fleas, or at least their larvae, can live year-round in your home and garden and ticks can transmit nasty diseases. On your puppy’s first consultation, the vet can advise you on flea and tick prevention as well as how to treat your puppy for tapeworm, roundworm and, if necessary, lungworm.