Dr. K's clinic fills up with mysterious cases, including a one-year-old sugar glider who is lethargic and isn't eating, a gassy rabbit who worries Dr. K, and a baby macaw who suffers fainting spells. A sassy prairie dog has a toothache and Dr. K finds that she has food and blood stuck in her teeth. If she doesn't address this quickly, Sassy could have a serious problem.

Dr. K's staff has their hands full with surprising cases, including an unusual water amphibian that has lost her groove, a wild softshell turtle that is hit by a car needs immediate attention, a Quaker parrot with an eye pecked out and a severely dehydrated potbellied pig that is in trouble.

It's a wild day at Dr. K's clinic as a malnourished three-month-old lemur rushes in barely breathing and in shock and Stuart, a beloved mouse, get a much-needed eyelift. A good Samaritan rushes in with a wild Muscovy duck that was shot by a neighbor. Dr. K examines the duck and finds that the bullet went into his wing, breaking the wing and that the bird will likely never be able to fly.