The outside route deserves a look
In Wisconsin, odorous house ants may follow siding, deck boards, and door frames. A route beside the house can continue into a kitchen without establishing an indoor nest. Observe where the movement crosses the building boundary before deciding what needs attention.
Moisture can change the setting
Dense mulch against a wall, a damp spot, or a plumbing leak may be relevant to ant activity. Describe the condition without assuming it explains the entire problem. Different ants have different habits, so an identification remains more useful than treating every small dark insect alike.
Keep the garden and kitchen distinct
Store accessible food securely and clear spills indoors. Outside, notice vegetation that touches the building. A proposal should explain why a particular area needs attention rather than treating the presence of ants anywhere in a living landscape as a reason to treat the whole yard.
A more focused Brookfield conversation
Call with the place the trail enters and the room it reaches. Ask whether the investigation can connect those points and what maintenance may help. The objective is to understand the crossing into the home, not to remove every ant from the property.
Further reading: Ant identification and management