Weird observation: This comic appears to be using a rule I like regarding repeating vowels in words. That being if the word has one vowel in a place, that it should always be replaced by an odd number of the same vowel if a lengthening of that vowel is to be implied. Likewise, an even number, usually double-e or double-o, should always be an even number.
So a dooooog might howl at the moooooon, but a doooog can't howl at the mooon because that implies a doog howling at the mon, whatever the heck that means.
Anyway, panel three has odd numbers of O's in both words, which is what I'm basing my observation on. Panel four is inconclusive.
(This rule need not apply to shortening a word)