I give my 6 year old chipoo nexgard also but I don’t give it through the winter. Up north the fleas are not a problem for a few months but they’re a nightmare in the summer. It also saves me money as this stuff is not cheap. When my previous bishon got fleas (from a neighbors dog who wasn’t on any preventive I had him shaved down). As far as your house, my vet told me that salt kills the eggs so I bought 20 lb bags and spread it all over my house, sofa and bed. Anything I couldn’t run through the washer with hot water. I left the salt on the carpet, wood floors and furniture overnight and then vacuumed like crazy. I kept the dog in the bedroom most of the day and did the bedroom when we were downstairs. 30 years ago my shepherd had them and infected the entire house. An exterminator “bombed the house”. We left for 2 days. IT worked but anything that wasn’t locked in the refrig or oven cans and to be washed. That meant all the dishes etc. and linens. It was a mess. This time the salt was much easier. Good luck.
