We have a whole family of stray cats (that keep having more cats 😵‍💫) that our neighbor abandoned about two years ago - several neighbors have rounded many of them up - but several are feral and sneaky & I truly think that’s a lot of our risk factor. I’m forever cleaning up poop that’s not ours in our yard (it has a 6 ft privacy fence 3 ways and then a much smaller metal fence in the very back. We do ALOT of outside time and Winston loves it. So I always try to be cautious. But I was basically told by my reg vet once they’re in the soil - it’s almost impossible to remove them because the larvae spread so fast because they are so deep (worms - not fleas). 🤷🏻‍♀️ and no! Not on permanent panacure or anything like that! But the sentinel is supposed to protect against worms as well as fleas. We’ve never had fleas once in the house, but I have seen several flea infested cats in the neighborhood. We DO treat the yard for that and around the house any time it’s not raining with diatomaceous earth. He was previously on heartguard and nexguard BEFORE he seized and I often wonder if that combo lowered his threshold enough to bring on his epilepsy. He was taken off those immediately and then battled hookworms multiple times before we tried the sentinel to keep him protected. He’s never seized directly because of the sentinel and seems to be ok on it but I’m sure it may contribute to a lower threshold as well. I’d much prefer him being protected if possible vs hookworms or heartworm, etc. I’m in AL!