I have 5 dogs. You can try Comfortis or others but I just started using Activyl this summer. It's $55.00 (2 months for 5 dogs) on Amazon and my dogs have not a flea since July. Don't I know if First Coast no more homeless pets sells it too but always check with your vet before starting a new Med.
Depends on what kind u want. I know trifexis is like 20 a month for 60-120 lb dog or they offer deals. Hope this helps.
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