The plot of the Manimal TV series closely paralleled the premise of this thread, except the main character did not have to choose one animal and could become any animal he wanted to become. However, the show lasted less than 3 months in 1983 after being released, and only 8 episodes were produced. The show was subject to repeated scorn and ridicule on late night TV at the time, and is consistently listed among the worst science fictions TV shows of all time:
What if one of the SPs was annoyed by you buzzing around, whipped out a fly swatter before you could react, and crushed you with it? I have a very high success rate with my fly swatter when one gets in the condo. Usually they are dead within 3 swats.