The calf's mother eventually passes away in "Smart and Stupid" and is seen mourning the loss of his mother in "30 Years of Science Down the Tubes". Carol attempts to get the calf to drink from its milk bottle for three days, but Phil ends up getting the calf to drink from its bottle.
The calf also appears in "You're All Going to Diet" being loaded up into the trailer by Todd as the group leaves Malibu and on a roadtrip with the group in "Five Hoda Kotbs". The calf also appeared in "The Big Day", now fully grown, at Melissa and Todd's wedding ceremony.
The calf is revealed to have been forgotten when the group abandons the office building and heads elsewhere in "Nature's Horchata" after discovering nuclear meltdowns will begin happening.