CatDog (1998)

Season 3: Episode 5

A rich blind fellow, Mr. Wolfington needs to hire a new seeing eye dog, so he agrees to hire Dog from CatDog. Cat is overjoyed because he finally is living in the lap of luxury as he always dreamed. CatDog overindulge and eat the finest foods, but something that they eat is just a little too rich for Dog, that he suffers a severe allergic reaction and can't see the next day when Mr. Wolfington needs him the most, to meet his friend in France.