The second of only two (of 13) The Ant and the Aardvark (1969) cartoons, that had an additional off-screen voice actor or actress, other than John Byner. Scratch a Tiger (1970) was first.
This plot summary extremely like & extremely identical to Warner Brothers' animation Looney Tunes cartoon "Greedy for Tweety (1957)". The three injured animals, (Charlie Ant, Blue Aardvark & a dog) all have a broken leg. After Charlie Ant & Blue Unnamed Aardvark recover from their injured legs, they are hit again, injured & hospitalized. When the Aardvark starts to walk towards Charlie Ant's bed, he hits the cast that is between them, thinking it is still the dog. But is scared out of the hospital, after he hits the cast & this time it is the tusk of a rhinoceros, that chases the Aardvark out of the hospital. [then the Closing Credits' music begins]