There was a news article I read recently which told of the dangers of
over the counter flea and tick medicines. Vets are supposedly seeing a
large increase in the number of animals with liver and other problems
due to these medicines and chemicals in the pet food.
What medicines do you all think are good and safe to use to get rid of
fleas and ticks and also heartworm medicine?

We have small dogs and one is sensitive to meds. He has had an
allergic reaction to shots and also some sort of a nervous system
problem from a heartworm pill. (both of these problems went away with
no lasting issues)

Thanks