Fleas in a home with no pets: how it happens
Cat fleas are the usual species in UK homes. They can hatch in a house with no current pet because pupae wait in carpet for vibration and warmth — a new tenant walking in is enough.
Dormant pupae
The pupal stage can sit in pile and under furniture for weeks. Previous occupants' pets, visiting animals or wildlife in a void can leave that reservoir.
Wildlife
Birds' nests in soffits and mice in lofts can introduce fleas. Treating the carpet without checking those sources invites a return.
Bites
Ankle bites after moving in are a classic pattern. Check socks and trouser legs for small dark insects.
The honest timeline
One spray rarely ends it. Emerging adults need a follow-up window. Vacuuming on the agreed plan matters.
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