Petya was limping because of
an abscess in his heel.
This entry is concerned with the word пїтка referring to a part of the human foot. This word does not refer to animals. The word пїтка is also used to refer to the corresponding part of a sock or stocking, e.g. чџлки с рвђными пїтками "stockings
with a run in the heel," a meaning not described in this dictionary.