After Papi tells the pups the story about the fearless Chihuahua warriors, Papi Jr jumps up on the flowerpot on the window, pretending that he was a warrior fighting a poisonous snake (which in actuality was a vine). The screws come loose, however, and both the flower pot and the puppy go crashing to the ground from the second floor. Delgado, the German Shepard police dog that Chloe met in the first movie, catches Papi Jr and puts the pup safely on the ground, but the pot can be heard smashing against the ground. However, in the wide shot afterwards, there is no sign of broke ceramic, and when it shows the other puppies looking out the window, the pot is back in place, with no sign of it ever breaking free.
In the rainforest scene, there is a chameleon. The Amazon is not their natural habitat.
Though the poodle is introduced as female and is voiced by a woman, when the dogs are in the park you can clearly see that the dog is male.