The burglars stole a week's food from the house of Haylie Anderson at Milton home, in South Otago, New Zealand, Stuff.co.nz reported.
Anderson found clothes pulled out of drawers in her bedroom, the bed slept in -- possibly by two people -- and a strong odour of cannabis in the air.
Amid the mess, bolts were removed from her six-month-old baby's cot, while baby towels were stolen. A week's worth of food that included four cans of baby food were also taken.
"My pantry was pretty much cleaned out, and my freezer as well. It was probably someone hard up, but I'm a single mother myself with two young kids so it is a bit shitty that someone has done that (stealing kids' food) to me," Anderson said.
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"I am just trying to find some answers," she added.
Police investigating the break-in and said it was probably the work of "some drunken idiot".
"The burglar gained access by forcing open a bathroom window of the rental property sometime between Wednesday and Saturday," he said.