I just saw on earthclinic.com that one lady's dog got over needing meds for asthma when she put him on (or was it a cat?) on ascorbic acid/Vitamin C powder 3X a day. You can get the powder cheap & good at Vitacost. It can be mixed with anything. Though it is necessary, very, to kill parasites, I absolutely belief having enough vitamins & minerals makes it more difficult for them to thrive & helps to make up for some that they
absorb from the body.