Hospitals

"Hospitals" is Episode 5 in Season 4.

Synopsis
Muffy's throat is sore so Sam takes her to the hospital where Dr. Bennett treats her - even though she has never treated a mouse. She then discovers that Muffy has "mouse-tonsillitis" and she must have surgery to have her tonsils out.

Back at the store, Jeff is worried about Muffy and yells at Mrs. Pennypacker unintentionally. But in the end, everything turns out all right.